① 求英語從句語法資料！
在句子中起名詞作用的句子叫名詞從句(NounClauses） 名詞從句的功能相當於名詞片語,它在復合句版中能擔任主語、賓權語、表語、同位語等，因此根據它在句中不同的語法功能，名詞從句又可分別稱為主語從句、賓語從句、表語從句和同位語從句。 給你分享一份「英語語法大全」:，更多資料到Vickey新概念英語上學習！
② 求高中英語語法中的從句部分，盡量講得詳細些的。
這個 三言兩語講不清
①【定語從句】
表特指：This「s the school that you visit
***********such和不定代詞版all，much，little，few都可以做先行詞
***********reason後面的連接詞用權why還是that/which【注意】
***********time後面的連接詞用when還是that【注意】
***********定語從句中缺狀語（情況）/reason後面跟why還是that
②非限制性定語從句
非限制性定語從句通常不能用that引導
非限制性定語從句不能用why引導
非限制性定語從句置於句首時，不能用which引導
非限制性定語從句由「介詞+關系代詞」引導時，其中的關系代詞不能用as
在非限制性定語從句中，指人的關系代詞作賓語時，只能用賓格whom; 不能用who替換，也不能省略
【注意積累思考感悟~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~順祝學習進步】
③ 誰能講一下英語中從句和各種語法
這個很多的，不好說呀，不過推薦給你一本不錯的書呦，書名是高中英語語法，黑皮的，裡面講得很詳細，很易懂的，很不錯，對你會有幫助的。
④ 幾個英語從句中的語法求人指點下。
To sell such a suit as that （is） to a millionaire！
這個句子中as是介詞，意思是像那樣。和它引導的定語從句一樣的意思。就是結構不同。如後面加上is那就是它引導了定語從句。因先行詞被such修飾所以用as來引導。如下面的例子
I have never heard such things as you told us. （as引導的正是定語從句和它也是因為先行詞被such修飾）
I have never heard such things as that.(這句中的as是介詞和你給的句子一樣，這樣後面就不是從句但從意思上看也相當於上面那樣的定語從句。)
在賓語從句中的時態要看主句。分兩種情況。 當主句為一般現在時，從句根據時間狀語可用各種時態。如 I want to know where you went yesterday.
當主句為一般過去時，從句也用過去時的一種，除客觀真理用一般現在時。如
He told me that he would go to Beijing next month.
He told me that he had met Tom the day before.
The teacher told us that the earth goes around the sun.(客觀真理用一般現在時)
⑤ 英語語法中的從句
大致有下面幾種（以下是我個人總結的，僅供參考）：
一、名詞性從句
其中又包括主語從句、同位語從句、賓語從句、表語從句
What I have is only a piece of bread.(What引導的主語從句)
News spread in the village that he came back.(that引導的同位語從句)
I think that you are right.(that引導的賓語從句)
What I appreciate is that you are brave.(that引導的標語從句)
二、形容詞性從句
也就是定語從句
The mountain is beautiful from the top of which we can see our school.(which 引導的定語從句)
三、狀語從句
主要有時間狀語從句、地點狀語從句、原因狀語從句、條件狀語從句、目的狀語從句、讓步狀語從句、比較狀語從句、程度狀語從句、方式狀語從句、結果狀語從句
I will call you as soon as I arrive in Beijing. （as soon as引導的時間狀語從句）
You should have put the book where you found it.(where引導的地點狀語從句)
I hate you because you hurt me.(because 引導的原因狀語從句)
If it is convenient,I will help you.(if引導的條件狀語從句)
You must speak louder so that you can be heard.（so that 引導的目的狀語從句）
She passed the examination though she had not studied very hard.(though引導的讓步狀語從句)
She finds it easier to read than to write．（than引導的比較狀語從句）
⑥ 求英語所有語法
1、小學英語介詞at，in與on在時間方面的用法
at表示時間的一點；in表示一個時期；表示特殊日子。如：
He goes to school at seven o』clock in the morning. 他早晨七點上學。
Can you finish the work in two days. 你能在兩天內完成這個工作嗎？
Linda was born on the second of May. 琳達五月二日出生。
1>. at後常接幾點幾分，天明，中午，日出，日落，開始等。如：
at five o』clock （五點），at down （黎明），at daybreak （天亮），at sunrise （日出），at noon （中午），at sunset （日落），at midnight （半夜），at the beginning of the month （月初）， at that time （那時），at that moment （那會兒），at this time of day （在一天的這個時候）。
2>. in後常接年，月，日期，上午，下午，晚上，白天，季節，世紀等。如：
in 2006（2006年），in May，2004 （2004年五月），in the morning （早晨/上午），in the afternoon （下午），in the evening （晚上），in the night （夜晚），in the daytime （白天），in the 21st century （21世紀），in three days （weeks/month）三天（周/個月），in a week （一周），in spring （春季）。
3>. on後常接某日，星期幾，某日或某周日的朝夕，節日等。如：
on Sunday （星期日），on a warm morning in April （四月的一個溫暖的上午），on a December night （12月的一個夜晚），on that afternoon （那天下午），on the following night （下一個晚上），on Christmas afternoon （聖誕節下午），on October 1，1949 （1949年10月1日），on New Year』s Day （新年），on New Year』s Eve （除夕），on the morning of the 15th （15日的早上）等。
2、 巧記形容詞的排列順序
當兩個以上形容詞修飾一個名詞，形容詞該如何排 列?為什麼不能說a black new pen，而是說成a new black pen? 這裡面有無規則可循? 如果你記住opshacom這個為幫助記憶而杜撰的詞， 就能掌握英語中形容詞排列的順序。 opshacom中p代表opinion，指表示人們觀點的形容 詞，如beautiful，horrible，lovely，nice等； sh代表shape，指表示形狀的形容詞，如long，short，round, narrow等； a代表age，指表示年齡、時代的形容詞，如old，new，young等； c代表colour，指表示顏色的形容詞，如red,black, orange等； o代表origin，指表示國籍、地區的形容詞，如british，canadian，german等； m代表material，指表示材料的形容詞，如plastic，metal，aluminium等。 英語中這六類形容詞連用時就按上述先後順序排列， 如a nice long new black british plastic pen 當然，實際語言使用中不可能出現這么多形容詞連 用的情況。
請根據形容詞排列規則完成以下練習：
1>.she has a ___ jacket.(leather，brown，beautiful)
2>.he has a ___ car. (american，long，red)
3>.they live in a ___ house. (old，beautiful)
4>.we have a ___ table. (antique,small，wooden)
5>.he has a ___ jumper. (woollen, lovely, red)
6>.she has a ___ ring. (diamond，new，fabulous)
7>.it was a ___ song.(french，old, lovely)
8>.he owns a ___ dog.(black，horrible，big)
9>.she bought a ___ scarf.(gorgeous，silk，pink)
一、一般現在時主要用於：
1 、表示經常性或習慣性動作。
e.g. It seldom snows here.
2 、表示現在的特徵或狀態。
e.g. He is always ready to help others.
3 、普遍真理。
e.g. Action speaks louder than words.
4 、劇情圖片介紹，背景說明，動作解說。
e.g. (Tom enters the room_and_sits at the table)
Doctor ： What`s your trouble, young man?
Tom ： I`ve caught a cold, doctor.
5 、時間、條件、讓步、方式狀語從句表將要發生的動作時。
e.g. Tomorrow we shall go for an outing unless it rains.
與這種時態連用的時間狀語常有：
always, often, never, seldom, usually, once, a week, now 等。
二、一般過去時主要用於：
1 、表示過去某個時間發生的動作或情況（包括習慣性的動作或狀態）
e.g. When did you read the novel?
She often came to help us in those days.
2 、談到過去的情況時
e.g. I didn`t know you were so busy.
3 、談到已死人的情況時
e.g. Lei Feng was a great communist fighter.
與這個時態連用的時間狀語常有：
yesterday, last night, the other day, two months ago, in 1985, then, just now,
when, after, as soon as 引導的時間狀語從句，表示主句動作開始的時間。
三、現在完成時主要用於：
1 、表示到現在為止這一時期中發生的動作或情況，即多次動作的總和。
e.g. We have learnt four English songs this month.
How many times have you read the novel?
For many days we haven`t seen each other.
2 、表示對現在有影響的某一已發生的動作。
e.g. The delegation has left 代表團已經走了（說明現在不在這里）
Look, what you have done. 看你乾的事。
與這一時態連用的時間狀語有：
already, yet, just, ever, never, by now, so far, recently, by the end of this month, since, for 短語，連詞 since 引導的時間狀語從句。
一般過去時與現在完成時的區別：
一般過去時：重在說明動作在過去發生時的具體情況（時間、地點、方式、對象、細節等）。
現在完成時：只提起已發生的動作（事實）及其影響，不說明動作發生時的具體情況。
cf. Have you had your lunch?
What did you have for lunch?
I have ever been to the Great Wall,_and_I went there last summer with my father.
註：現在完成時表達的動作常具有反復性，故下面一句是錯的：
Have you seen the six thirty`s news program?
應改為：
Did you see the six thirty`s news program?
四、現在完成進行時主要用於：表示過去開始的某一動作一直持續到現在，以至延伸到將來，它強調動作延續時間之長久。
e.g. I`ve been writing an article. 我一直在寫一篇文章。（還在寫）
cf. I`ve written an article. 我寫了一篇文章。（已寫完）
It has been raining these days. 這些天一直在下雨。
五、過去完成時
1 、過去完成時是一個相對時態，表示過去的過去，只有在兩個過去發生的動作相比較時才可顯示出來。
e.g. As soon as we got to the station, the train had left.
註：主從句表達的動作緊接時，即兩動作發生的時間沒有明顯時間上的懸殊或空檔時，主從句都可用一般過去時。
e.g. Where did your brother study before he joined the army?
2 、過去完成時可表示截止過去某一時間動作的總或動作的結束。
e.g. By the end of last month. We had reviewed four books
By eight o`clock, he had finished his homework.
與這個時態連用的時間狀語常有：
by 1985, by eight o`clock, by then, by the end of last month, by the time when, when, as soon as, before 等連詞引導的時間狀語從句，表示主句動作結束的時間。
六、現在進行時主要用於：
1 、表示現在或現階段正在進行的動作。
e.g. Listen, someone is crying.
What are you doing these days?
2 、代替一般現在時，表示經常性動作或狀態，而含有某種感情色彩。
e.g. How are you feeling today?
你今天感覺怎樣？（顯得親切）
He is doing well in his lessons.
他的功課很好。（贊揚）
You are always boasting.
你老愛吹牛。（厭煩）
3 、動詞 go, come, leave, arrive 等表將要發生的動作時。
e.g. They are leaving for Shanghai.
與這種時態連用的時間狀語常有：
now, these days, recently, this week 等。
七、過去進行時主要用於：
表示過去某個時刻或階段正在進行的動作。
e.g. At that time she was working in a PLA unit.
那時她在解放軍某部工作。
What were you doing this time yesterday?
與這個時態連用的時間狀語常用：
at nine o`clock, this time last night, these days, at that time 等。
用 when 引導的時間狀語從句表示主句的動作正在進行的時間。
e.g. When he came in, I was reading a newspaper.
註：
1 、 while 引導時間狀語從句敘述過去的動作時，從句常用過去進行時。
e.g. I read a magazine while I was waiting for the bus.
2 、 when 用作並列連詞，意為「這時」，連接兩分句時，第一句多用過去進行時。
e.g. I was reading a newspaper when he came in.
一般過去時與過去進行時的區別：
一般過去時：強調過去某一時間開始或完成的動作。
過去進行時：強調過去某一時間正在進行的動作。
試區別下面兩句： We were building a reservoir last winter.
去年冬天我們在修建一座水庫。（可能尚未建成） We built a reservoir last winter.
去年冬天我們修建了一座水庫。（已經建成）
八、一般將來時主要用於：
表示將要發生的動作或情況
e.g. Tom will have a bike of his own.
與這個時態連用的時間狀語常用：
tonight, tomorrow, the day after tomorrow, next week, in three hours, two days later 等。
一般將來時態與其它結構表將來情況的區別：
一般將來時態 ：主要從時間的角度表將要發生的動作或情況。
be going to 結構 ：①表（主觀上）打算或准備做某事時。 ②表有發生某事的預兆時。
e.g. They are going to have a competition with us in studies. It is going to rain.
據以上區別，故下面一句是錯的：
I am going to be eighteen years old next year.
應改為： I shall be eighteen years old next year.
be about to do sth 結構 ：意為「剛要做某事」、「馬上要做某事」強調時間之緊迫性。
e.g. We are about to discuss this problem.
我們將馬上討論這個問題。
be to do sth 結構： 表示按計劃、安排、規定將實施某事或表示註定會發生某事。
e.g. When is the train to leave.
回答者： 凌心驪歌 - 試用期 一級 2009-6-3 21:39
1.I went home （at six）.(就劃線部分提問）你給他講，問時間用What time/When代替，放在句首，這是一般過去時，變成一般疑問句時「did+主語+動詞原形」，劃線的部分去掉，就變成了：What/When did you go home?
2.He can sing English songs.(變成否定句），這是含有情態動詞的句子，變否定句時，在can的後面加not就行了。就是：He can not/can't sing English songs.
3.She will wash her clothes tomorrow.你給他們講：這是一般將來時，變成一般疑問句時，把will提到句首，和主語調換位置，其它的落下來，句末加問號。就變成了：Will she wash her clothes tomorrow?
4.Tom is in.(同意句）in的意思是在家，愛他at home也是在家的意思，所以，in與at home意思相同，故Tom is in.的同意句就是：Tom is at home.
5.There is a sheep on the hill.(山上有一隻羊）（變成復數句）
講，is的復數是are,a的復數是some，sheep的單數與復數相同，所以應變成：
There are some sheep on the hill.
這種方法對你很有幫助的，堅持下去！
⑦ 求英語從句及其分析
什麼是定語從句
在句中起定語作用,修飾某一名詞或代詞,或修飾整個主句的從句,叫做定語從句(The Attributive Clause).被定語從句所修飾的詞叫做先行詞(Antecedent).定語從句通常跟在先行詞之後,由關系詞(Relatives)引出.因此,定語從句又可稱為關系分句.
關系詞
關系詞可分為：
(1)關系代詞 e.g.:that,which,who,whom,whose etc.
(2)關系副詞 e.g.:when,where,why etc.
關系詞既起著聯系從句與主句的作用,又代替先行詞在從句中擔任一定的語法成分.如主句,賓語,定語,狀語等.
e.g.:
The woman who is standing by the classroom is our Chinese teacher.
在此句中,the woman是先行詞;關系代詞who引導定語從句,同時代替先行詞在從句中擔任主語.
This is the room where Bin Ladin once lived.
在此句中,the room是先行詞;關系副詞where引導定語從句並在從句中擔任地點狀語.
關系代詞引導定語從句
Who:代替人.
做主語:
The girl who plays the piano very well is his girlfriend.
做表語:
She is no longer the woman who she used to be.
做賓語:
I can't remember the man who I gave the key to.
Whom:代替人.
做動詞賓語:
Where is the student whom Professor Nirth praised at the meeting.
做介詞賓語:
The girl with whom he was traveling is his girlfriend.
註：在「介詞提前」即「介詞+關系代詞」結構出現時，關系代詞只能用 whom 和 which 。
Whose(=of whom/Which):
代替人(做從句中某名詞的定語):
She is looking after the little child whose parents have gone to Singapore.
代替物(做從句中某名詞的定語):
He lived in the room whose windows face south.
That:
代替人:
做主語:
The man that is speaking at the meeting is a famous scientist.
做賓語:
Is this the teacher that you talked about yesterday.
做表語:
She is no longer the girl that she was in her childhood.
代替物:
做主語:
The train that has just left is for Beijing.
做賓語:
Is this the photo that you took last summer?
做表語:
I wish my home town was not a polluted place that you think it to be.
Which:代替物.
做主語:
The building which stands near the train station is a company.
做賓語:
The computer which she wanted to buy was sold out.
做表語:
She was fond of dancing,which her husband never was.
關系副詞引導賓語從句
關系副詞在意義上常常相當與一個"prep.+which"的結構.
When(=at,on,in,ring + which):代替時間名詞.做時間狀語:
I shall never forget the day when(on which) we moved into our new flat.
Where(=in,at + which):代替地點名詞.做時間狀語:
This is the place where(at which) John parks his car.
Why(=for which):代替指代原因.做原因狀語:
She didn't know the reason why(for which) she was dismissed.
⑧ 英語從句語法知識求教
英語中六大從句用法總結
1.主語從句
1）主語從句可直接位於主語的位置，如果從句較長，謂語又較短，可用it作形式主語，而將從句放在句末。常見的句型有：
*It is a fact\a pity\a question\good news that...
*It seems\appears\happened\has turned out that...
*It is clear\important\likely\possible that...
*It is said\reported\estimated\has been proved that...
It is said that comic books create a connection between people of the same generation.
It seems that the performance is very useful.
2)what引導的主語從句表示「...的東西時」，一般不用it作形式主語。
What we lack is experience.
3)what,who,when,why,whether等詞含有各自的疑問意義，但它們引導的主語從句，都用陳述語序。
How the plan is to be carried out should be discussed again.
I did know why I felt like crying.
2.賓語從句
1）賓語從句可位於及物動詞、介詞和某些形容詞後。連詞that常可省略。介詞後一般接疑問詞引導的賓語從句。in that(因為),except that(除了),but that(只是）已構成固定搭配，其他介詞後一般不接that引導的賓語從句。
*I promised that I would change the situation.
*All this is different from what American young people would say about friendship.
*He is certain that watching so much television is not good for children.
*This article is well-written except that it is a bit too long.
2)賓語從句後如有賓補，要用形式賓語it來代替，而把賓語從句移至賓補之後。
He has made it clear that he would not change his mind.
3)在think,believe,suppose,expect等動詞後的賓語從句中，如果謂語是否定的，一般將否定詞移至主句謂語上，賓語從句則變成肯定形式。
He didn't think that the money was well spent.
3.表語從句
表語從句出現在結構為「主語+系動詞+表語從句」的句子中。表語從句除可用that,what,when,why,whether,how等引導外，還可由because,as if(though)等引導。that常可省略。如主句主語為reason,只能用that引導表語從句，不可用because.
Perhaps the most important thing to remember is that there is no one common type of life in America.
The reason why so many people died there is that there were not enough food supplies.
It looks as if successful international cultural communication will make the world smaller.
4.同位語從句
同位語從句用於對前面出現的名詞作進一步說明，一般用連詞that引導，由於先行名詞的意義不同，也可用whether,who,when,where,what,why,how等引導。常見的先行名詞有fact,idea,belief,news,hope,conclusion,evidence,suggestion,order,problem,report,decision.有時由於謂語較短，將同位語從句位於謂語之後。
She finally made the decision that she would join the fashion show.
I had no idea how many books I could borrow at a time.
The news came that their team had won the championship.
5.定語從句
定語從句所修飾的先行詞可以是名詞或代詞，也可以是一個句子。定語從句通常位於先行詞之後，由關系代詞或關系副詞引導。
*限制性定語從句
限制性定語從句修飾先行詞，對先行詞起修飾作用，緊接先行詞之後，無逗號，若省去，原句意思不完整。引導定語從句的關系代詞有who,whom,whose,which,that等。who,whom,whose用於指人，whose有時也可指物，相當於of which；which用於指物；that既可指人也可指物，但只用於限制性定語從句中。關系代詞除了引導定語從句，替代先行詞外，還在從句中擔任主語、賓語、定語等。
The computers and cables which make up the Internet are owned by people and organizations.
Those
⑨ 英語語法英語從句
主要是賓語從句和狀語從句，如果說考的稍微難一些的話就是定語從句以及名詞性從句，一般考的話後兩者的難度不會很大。
賓語從句在句中作及物動詞或介詞的賓語，從句放在主句之後，前後不用逗號分開。
賓語從句：
引導賓語從句的詞有：
連詞that(在口語中that常可省略)，if, whether,如：
He knows that Jim will work hard.
連接代詞who, whom, which等，如：
Do you know who (whom) they are waiting for?
連接副詞when, where, how, why等，如：Could you tell me how we can get to the station?
3.whether和if都有「是否」的意思，一般情況下兩者可以換用，但在介詞之後，
不定式之前，與or not連用，在句首或在引導表語從句，同位語從句時，只能用whether,如：I want to know if/whether the news is true. He doesn't know whether to stay or not?
4.賓語從句要用陳述句語序。
5.賓語從句一定要注意時態呼應，即：當主句謂語動詞是過去式時，從句中謂語動
詞也要用過去范疇的時態，但若從句陳述的是真理或客觀規律，其謂語的時態仍用一般現在時，如：
He asked who could answer the question.
My father told me that the earth goes around the sun.
6.一個賓語從句只能用一個連詞。
7.當主句謂語動詞是think, believe等動詞時，賓語從句的否定意義要放到主句中。另外，當主句主語為第一人稱時，後面若接附加疑問句，那麼附加疑問句的主語、謂語應與從句中的主謂語保持一致。如：
I don't think he looks like his father, does he?
8.直接引語和間接引語也是賓語從句，直接引語是引述別人的原話，放在引號內，
不用連詞聯接；間接引語是用自己的話轉述別人的話，通常用連接詞與主句聯接。
(1)陳述句變為以that引導的賓語從句，如：
He said,「I'm happy.」[FY()[FY]]He said that he was happy.
(2)一般疑問句變為if(whether)引導的賓語從句，如：
He asked me,「Does his father know Mr Green?」
---He asked me if his father knew Mr Green.
(3)特殊疑問句變為由who, what, where, how等疑問詞(連接代詞或連接副詞)引導的賓語從句，如：
He asked me,「Where is Mr Wang?」
---He asked me where Mr Wang was.
注意上述例句中連詞、時態、語序等變化
⑩ 我是准高三的，求英語從句語法資料！（高懸賞！）
高中英語各種復合句精品課程講解
（英語尖子生培訓課
什麼叫名詞性從句？
在句子中起名詞作用的句子叫名詞從句 (Noun Clauses）
名詞從句的功能相當於名詞片語, 它在復合句中能擔任主語、賓語、表語、同位語等，因此根據它在句中不同的語法功能，名詞從句又可分別稱為主語從句、賓語從句、表語從句和同位語從句
【一】主語從句 【二】表語從句 【三】賓語從句
【四】定語從句 【五】同位語從句 【六】狀語從句
【一】主語從句：在主句種充當主語成分的從句叫主語從句，
引導主語從句的連詞有：從屬連詞；連接代詞；連接副詞
A 從屬連詞：that，whether。
從屬連詞；that，whether引導的主語從句在主語從句中不充當任何成分,只起連接詞的作用，通常不可以省略。分句置於句首時，that絕對不可以省略。如果是由It作形式主語，後面that可以省略.
1,有that 引導的主語從句如下：
1. That the driver could not control his war was obvious.
=It was obvious（that）the driver could not control his car.
2. That she was chosen made us very happy.
=it made us very happy that she was chosen
3. That he is still alive is sheer luck. 他還活著全靠運氣。
=It is sheer luck that she is still alive
4. That the whole project is doomed to failure is quite clear
=It is quite clear that the whole project is doomed to failure.
很清楚，整個計劃註定要失敗。
5. That you should have to leave is a pity
=It's a pity that you should have to leave.
你非走不可真是件憾事。
6. That he will refuse this piece of advice is impossible.
=It is impossible that he will refuse this piece of advice
7. That they should like each other is natural
=It is natural that they should like each other
8. That he will not come to the meeting this evening is true
=It is true that he will not come to the meeting this evening
9. That he will help others is a fact
10. That the earth turns around the sun is known to all.
=It is known to all that the earth turns around the sun.
11. That we can win is certain
=It is certain that we can win.
12. That you have made a mistake is a fact.
=It is a fact that you have made a mistake
13. It is ordered that we should leave at once.
14. That you don』t like him is none of my business.
用it作形式主語的that-從句有以下四種不同的搭配關系：
a. It + be +形容詞+ that-從句
It is necessary that…有必要……
It is important that…重要的是……
It is obvious that… 很明顯……
It』s certain that… 肯定…
It is possible that... 很可能……
It is unlikely that... 不可能……
It is necessary \important \natural\... that…
It is possible that she will come back tomorrow.
It is obvious that this measure is effective.
b. It + be +V ed 分詞+ that-從句
It is known to all that…從所周知……
It has been decided that… 已決定……
It is said that... 據說……
It is known to all that... 眾所周知……
It is reported that... 據報道……
It is believed that...據信……;人們相信……
It is suggested that + (should）do... 建議……
It must be admitted that…必須承認……
It cannot be denied that… 不可否認……
It must be pointed out that…需指出的是……
It was reported that 20 people were killed in the accident.
It was suggested that we should eat more vegetable and do more exercise
c. It + be +名詞+ that-從句
It is a pity/shame that... 遺憾的是……
It is a surprise that…令人驚奇的是…
It is common knowledge that… …是常識
It is common knowledge that…是常識
It is a fact that…事實是……
It was a pity that we lost the match.
It was a fact that he cheated in the exam.
d. It +不及物動詞+ that-分句
It appears that…似乎……
It happens that…碰巧……
It occurred to me that…我突然想起……
It occurred to me that I forgot to send this letter
It happened that I came into the office at that time.
It is important(necessary / advisable / desirable / imperative / true / strange / possible ...)that ...需要注意的是,這類主語從句中,謂語動詞很多為"(should)＋動詞原形",即要用虛擬語氣。例如:
It is necessary that several nurses (should) stay.
幾個護士留在這兒是很有必要的。
It is imperative that everyone (should) learn from practice.
每個人都應該從實踐中學習。
It is reported (well-known / hoped / thought / expected / said / believed / decided / suggested / ordered ...)that ...例如:
It is said that many people was killed in the earthquake.
據說很多人在這次地震中喪生了。
it seems(appears / doesn』t matter / makes no difference / ...)that ...
例如:
It makes no difference whether he will attend the meeting or not.
他是否會參加會議都無關緊要。
當用it作形式主語,而將主語從句放在句尾時,主語從句中的否定詞常要前移至主句中。例如:
It doesn』t seem that they are from the same university.
It doesn』t appear that we』ll have a sunny day tomorrow.
if 不能用在主語從句中，而是用whether，如果主語從句放在句首，不能用if引導，但是如果用it 做形式主語，而把主語從句放在句末時，也可以用if引導.或把if 改為whether
If Mary really heard him is really doubtful.
正：It was doubtful if Mary really heard him.
正: Whether Mary really heard him is really doubtful.
Whether he left (or not) is unknown
Whether he will come is not clear.
Whether it will rain or not) is not clear
Whether he』ll come here isn』t clear. 他是否會來這里還不清楚。
Whether we will go tomorrow )hasn』t been decided yet
Whether the meeting will be put off has not been decided yet.
Whether the policeman will come is not certain.
Whether the 2000 Olympic Games will be held in Beijingis not known yet.
Whether we』ll go camping tomorrow depends on the weather.
whether he likes the job is not clear.
.注意區分it 作形式主語的主語從句與強調句
強調句句型It is/was+被強調部分+that, 去掉It is/was, that，句子仍然成立。
It is natural that they should have different views. 主語從句
It is only lately that he had had a family himself. 強調句
What was it that he wanted? I don』t know what it was that he wanted.
It was in the hotel where he stayed that we discussed the serious problem
8.注意it 作形式主語的主語從句和as引導非限制性定語從句引導的不同
It is known to all that the earth is round.
As is known to all. the earth is round.
B連接代詞who ，what ，which, whatever, whichever, whoever (Who, whom, which, what可以和ever構成合成詞，和what一樣引導從句，ever起到強調作用。此類主語從句不能用形式主語it引導，它們在句子中擔任成分，不能省略，語序為陳述語序)
What many scientists believe is that the earth is round …
Who will take part in the meeting has not been decided.
Whoever breaks the law will be punished.
Which student will win is uncertain.
Whatever was said here must be kept secret.
這里說的話都應當保密。
Whoever makes mistakes must correct them.
凡犯了錯誤的人都必須改正。
What is needed for success) is your hard work.
Who can join in the sport meet) is decided by the teacher
What he needs is that book.
What he needs are some books.
What he needs are some books.
Who he is and where he is from are important.
What he saw are the stars in the sky
What he said at the meeting astonished everybody present
Whoever leaves the room last ought to turn off the lights.
C連接副詞when，where， how， why等。
Why they suddenly disappeared still remains a mystery.
When they will leave is not decided.
Where she is from is unknown.
How we will paint the house has not been decided.
When they will arrive has been told to the teacher
Where we will go tomorrow hasn』t been decided yet
When he will come is not known
When he will come is a puzzle
Where we shall spend the holiday isn』t decided.
Where he comes from is a mystery.
Conclusion:主語從句作 主語時，謂語動詞一般用單數形式
主語從句的規律
規律一、主語從句一律用陳述語序，即主語在前，謂語在後。
規律二、連詞that 在從句中無實際意義，但不能省略。
規律三、whether 可以引導主語從句， 放在句首，但if不能
規律四、主語從句中的連詞不能重疊使用
規律五、含主語從句的主句謂語動詞多用單數第三人稱形式。
規律六、what 引導的主語從句，可根據表語決定主句動詞的單復數形式
規律七、主語從句為了避免頭重腳輕現象，用 it 做形式主語，把從句放在後面。