❶ 求英语语法现在完成时讲解,例子,习题(附答案)
现在完成时
现在完成时是英文时态的一种
现在完成时的用法
have(has)+过去分词(done)
1.现在完成时用来表示现在之前已发生过或完成的动作或状态,但其结果却和现在有联系,也就是说,动作或状态发生在过去但它的影响现在还存在.
I have lost my wallet.(含义是:现在我没有钱花了.)
Jane has laid the table.(含义是:已可以吃饭了.)
Michael has been ill.(含义是:现在仍然很虚弱)
He has returned from abroad. (含义是:现在已在此地)
2. 现在完成时可以用来表示发生在过去某一时刻的,持续到现在的情况,常与for,since连用.
Mary has been ill for three days.
I have lived here since 1998.
3. 现在完成时往往同表示不确定的过去时间状语连用,如already, yet, just, before, recently, lately等:
He has already obtained a scholarship.
I haven't seen much of him recently (lately).
We have seen that film before.
Have they found the missing child yet
4. 现在完成时常常与表示频度的时间状语连用,如often, sometimes, ever, never, twice, on several occasion等:
Have you ever been to Beijing
I have never heard Bunny say anything against her.
I have used this pen only three times. It is still good.
George has met that gentleman on several occasions.
5. 现在完成时还往往可以同包括现在时间在内的时间状语连用,如now, up to these few days/weeks/months/years, this morning/week/month/year, now, just, today, up to present, so far等:
Peter has written six papers so far.
Man has now learned to release energy from the nucleus of the atom.
There has bee too much rain in San Francisco this year.
The friendly relations and cooperation between our two countries have been enhanced in the past few years.
Up to the present everything has been successful.
6. 现在完成时表示现在之前业已完成的动作,虽然其效果或影响仍然存在但已不再继续,但是有一些现在完成时的句子,在后面加上for+一段时间,则现在完成时的动作就表示延续性.
Thomas has studied Russian. (现在不再学俄语)
Thomas has studied Russian for three years. (=Thomas began to study Russian three years ago, and is still studying it now.(同第2点用法第一个例句)
7. 现在完成时还可以用来表示过去的一个时间到现在这段时间内重复发生的动作.
We have had four texts this semester.
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现在完成时的“完成用法”和“未完成用法”
1.现在完成时的"完成用法"
现在完成时的"完成用法"指的是动作发生在过去某一时刻并已结束,但该动作对现在产生了影响,与现在情况具有因果关系。
例如:He has turned off the light.他已把灯关了。(动作结束于过去,但说明的是现在的情况--灯现在不亮了。)
现在完成时"完成用法"的特点是动作不延续,因此,该时态只能与表示不定的过去时间状语(如:already,yet,before,recently等)、频度时间状语(如:never,ever,once等)、包括现在时刻在内的时间状语(如:this morning / month /year...,today等)连用。
例如: Have you found your pen yet?你已找到你的钢笔了吗?
2.现在完成时的"未完成用法"
现在完成时的"未完成用法"指的是动作开始于过去某一时刻,一直延续到现在,或可能还要继续下去。
例如:He has lived here since 1978.自从1978年以来,他一直住在这儿。(动作起始于1978年,一直住到现在,可能还要继续住下去。)
I have been in the army for more than 5 years.我在部队已经呆了五年多了。(动作开始于5年前,一直延续至今,有可能还要继续下去。)
此种用法的句中常需一个表示一段时间的状语(由since或for引导),或表示与现在时刻相连的时间状语(如:up to now,so far)等。
例如:I have heard nothing from him up to now.到目前为止我没有他的任何消息。
注意:(1)现在完成时的未完成用法只适用于延续性动词,不可用于终止性动词,即瞬间完成或延续时间很短的动词。如:come,go,arrive,leave,join,become,die等。
(2)现在完成时常见两种句型:
①主语+have / has been+for短语
②It is+一段时间+ since从句
例如:He has been in the League for three years.或It is three years since he joined the League. 他入团已三年了
一.have/has been doing sth.
1.现在完成进行时
当后面接有一段时间的词时,或是加表示时间的词时,可以用现在完成时.如果这件事现在还在持续或还在做,则可用
现在完成进行时.
如:I have been skating for 4 hours.
I have finished my homework.
2.现在完成时的被动语态.
后接动词的过去分词.
如:The building has been built for 5 years.
二.一般现在时:用动词原形
一般过去时:用动词的过去式
一般将来时:will/shall+do
is/am/are going to do
过去将来时:could/would do
现在完成时:have/has done
过去完成时:had done
将来完成时:shall have done
过去将来完成时:would/could have done
现在进行时:is/am/are doing
过去进行时:was/were doing
将来进行时:will/shall be doing
过去将来进行时:would/could be doing
现在完成进行时:have/has been doing
过去完成进行时:had been doing
将来完成进行时:shall have been doing
过去将来完成进行时:would have been doing
❷ 英语八大时态详细语法
http://..com/question/54291821.html
网络复早就制有人解答啦~
❸ 英语完成时态的用法
如果since后面加的是瞬间动词..表示否定意思....如果是持续动词...就是肯定意思...smoke是瞬间动词...要翻成不吸烟....我说的肯定对的...语法书上有的
❹ 英语中的语法,时态。所有的
1
一般现在时
主语
+
系动词
标志词有often,usually,always等
要注意“单三”,即he
she
it
2
现在进行时
主语+be动词
+动词-ing形式
标志词有now,at
this
time
3
一般过去时
主语+动词过去式
标志词有ago,
yesterday,
the
day
before
yesterday,
last
week,
just
now等
4
过去进行时
主语+
was/were
+
doing
标志词有at
that
time等
5
现在完成时
主语+
have/has
+
done
标志词有recently,
lately,
since
6
过去完成时
主语+had
+
done
标志词有before,
by
the
end
of
last
year等
7
一般将来时
主语+
①am/is/are/going
to
+
do;②will/shall
+
do.;③be+doing标志词有tomorrow,
next
day(week,
month,
year…),soon等
8
过去将来时
主语+①was/were/going
to
+
do;②would/should
+
do
标志词有the
next
day等
追问:语法呢?
追答:语法范围太大了吧。全部的语法说一年估计也说不完。建议买本适合自己的语法书看看。
追问:呃呃
❺ 英语时态语法
1. 在他脱掉衣服之前,她给了我一份饮料。
2. 还没等到他脱掉衣服,她就给了我一份饮料。
❻ 英语语法中的各种时态
时态(Tense)是表示行为、动作和状态在各种时间条件下的动词形式。因此,当我们说时态结构的时候,指的是相应时态下的动词形式。
英语时态分为16种:一般现在、一般过去、一般将来、过去将来时,以及这四者的进行时、完成时和完成进行时。在这里,我们重点讲解一下最常见的11种时态的用法和注意事项。
1. 一般现在时:小学就开始学这个,大家都会吧,有几点强调一下我们就走。
A) 表示现在发生的动作、情况、状态和特征。If it is not too much trouble, I would like a cup of tea.
B) 习惯用语:这个要在平时自己积累,因为习语太多,我不做过多解释。
Ie: Believe it or not, his discovery had created a stir in scientific circles.
口语中常说believe it or not,意思是:“信不信由你”,“我说的是真的”。believe it or not是一个固定说法,相当一个插入语,短语中的believe没有词形变化。这点要注意,以后会教你们动名词的用法,到时候会牵涉到主语的问题。
C) 经常性、习惯性动作。
Ie:He always helps others. (他总是帮助别人。)
D) 客观事实和普遍真理。尤其要注意,如果前后文不是一般现在时,则无法保持主句、从句时态一致.ex: He said that the sun rises in the east.这个句子要注意,到了以后的定语从句经常会有这样的问题,具体细节到时候在说,不过你们要先有这样的概念:客观事实无论谓语的时态是什么都用一般现在时。
E) 表示一个按规定、计划或安排要发生的动作,(仅限于某些表示“来、去、动、停、开始、结束、继续”等的动词 )可以与表示未来时间的状语搭配使用。常见的用法是:飞机、火车、轮船、汽车等定期定点运行的交通方式。
ex: When does the plan leave?这个句子注意一下,就是这么用的,有人会注意到这样的问题: The plane leaves at 3 o’clock this afternoon.为什么不用将来时,对了,很奇怪,但就是这么用的。
F) 在时间和条件状语从句里经常用一般现在(有时也用现在完成时)表示将来事情。
Ie: When you finish the report, I will have waited for 3 hours.(完成时,往下看会出现)
2. 现在进行时(be doing) 的用法:上了初一就教这个吧,比一般现在还简单。表示现在正在做的动作,但要注意有的动词不能用于进行时,这类词称为短暂性动词,如,open, borrow等等,在完成时态常常会碰到,平时要注意积累。
3. 现在完成时(have done):重要考点,初二以后几乎都是完成时态。
A) 表示动作到现在为止已经完成或刚刚完成。
ex: I have just finished my homework.
B) 表示从过去某时刻开始,持续到现在的动作或情况,并且有可能会继续延续下去。此时经常用延续性动词。时间状语常用since加一个过去的时间点,或for加一段时间,或by加一个现在时间。这里联系进行时,他们都一样,不能用短暂性动词,★★★☆☆考点。
C) 表示发生在过去,但对现在仍有影响的动作或情况。通常用点动词,如:arrive, begin, find, give, lose等。
例:John has broken his left leg.(约翰摔断了左腿。)
注意:
A) 现在完成时是联系过去和现在的纽带。现在完成时和过去时的区别在于:现在完成时强调动作的动态,或受动态的影响,是动态的结果,对现在有影响;过去时只表示过去的某个具体时间里发生的动作,与现在没有联系。
例:He worked in that hospital for 8 years.(他曾经在那家医院工作了8年。这只是讲述一个过去的事实,他现在已经不在那家医院了。)
He has worked in that hospital for 8 years.(他已经在那家医院里工作了8年。表示他从过去开始工作,一直工作到现在,现在仍在那家医院工作。)
B) 因为含有for加一段时间或since加一个时间点这样的时间状语的完成时,有动态和延续性的特点,所以不能使用终端动词或瞬间动词。
例:My sister has been married for 5 years.(过去分词做表语表示状态,可以延续)
My sister has married. Don't disturb her.(终端动词)
C) 在"this is the first/ second/ third…… time that……"句型里要求用完成时。
例:This is the second time that the procts of our company have been shown in the International Exhibition.(这是我公司产品第二次参加国际展览会。)
D) 句型"It is/ has been……since"所使用的两种时态都正确。
例:It is/ has been 10 years since I last saw him.(从我上次见到他以来已经10年了。)
E) 在"no sooner than"、"hardly/ scarcely ……when"、"before"、"prior to"等句型中,主句要求完成时。
例:I haven't met that professor prior to today.(以前我从未见过那位教授。)
4. 现在完成进行时(have been doing):和现在进行时很像
1) 用法:表示某一动作开始于过去某一时间,延续或重复地出现至今,或将继续延续至将来。
例:We have been working on this project for over a month now.(到目前为止,我们一直在处理那个项目,已经花了一个多月时间了。)
2) 注意事项:与现在完成时相比,现在完成进行时更强调:在从过去到现在的时间里,动作或状态一直持续或一直反复出现。
5. 一般过去时
A) 表示过去某个时间发生的动作或情况。
ex:I went to Beijing last year.
B) 表示过去习惯性动作。特别是由would/ used to do表达的句型,本身表示的就是过去时。
ex: I used to live here.(注意used to 和be used to 的区别,used to表过去常常,be used to 表示习惯于,前者to是不定式符号,后者则是介词,后接名词、动名词、代词)
C) 有时可代替一般现在时,表达一种婉转、客气、礼貌、商量的语气。
ex: Would you mind my sitting here?(您介意我坐在这里吗?)
Could you pass me the pen?
注意:
A) 注意时间状语的搭配。一般过去时的时间状语应该是表示过去某个时间的词或词组,如:yesterday, last month, in 1999, two days ago等,绝对不可与recently, in the past 10 years, this month等连用,因为这样的时间状语都与现在有关系,应该用现在完成时或一般现在时。注意,到了初二将会是★★★★☆考点,不会不行,逃不了的,几乎每次都考。
B) used to do的否定形式和疑问形式很特别:你怎么写都正确。以否定形式为例:used not to do, didn't used to do, didn't use to do都对。
6. 过去完成时(had done)
用法:表示在过去的某个时间或动作以前已经发生的动作或已经存在的状态。就是我们常说的:表示"过去的过去的动作或状态"。
画一条时间轴过去完成__●_一般过去_◇_一般现在___○______
2) 注意事项:“过去的过去”这种逻辑关系常通过上下文体现出来,而不一定受某个时间状语的限制。
ex: There had been some one in our room just now, because I noticed a burning cigarette end on the floor when we opened the front door.
7. 过去将来时(would/ should do) 表示从过去的某个时间看将要发生的事。其实和将来时没什么区别啦。
ex: I said on Thursday I should see my friend the next day.宾从、直引经常碰到这样的例子,注意。
8. 过去进行时(was/ were doing)
A) 表示在过去一个比较具体的时间正在发生的动作。
ex: I was doing my homework at this time yesterday.
B) 如果when, while这样的时间状语引导词所引导的主从句之一是一般过去时,则另一个句子常用过去进行时。
ex: I was washing my hair when you knocked at the front door.
9. 一般将来时
A) 基本结构是will / shall do。古英语认为will用于第二、三人称,shall用于第一人称,但后来没做硬性规定,will比较常用。I will be home at 10.
B) 有些动词,如:arrive, be close, come, do, done, go, have, leave, open, play, return, sleep, start, stay等,用于一般进行时,并且通常与一个表示将来时间的时间状语连用,可以表示将来时。初一接触比较多的是be going to,后面的包括will/shall到了后来才出现,其他如sleep很少见,初中阶段我几乎没见过sleep这么用的,leave, come, arrive也常见
ex: My mother is coming to visit me next week and is staying here until May.
C) 表示“即将、正要”时,可用be about to do。强调近期内或马上要做的事,后常与when连用。ex: I was about to speak when you interrupted me.
D)"be to do"的5种用法:
a) 表示“按计划、安排即将发生某事或打算做某事”。
例:She is to be seen in the lab on Monday.(星期一你准会在实验室见到她。)
b) 该做或不该做的事情(语气上接近于should, must, ought to, have to),表示一种命令、规劝性语气。
例:You are to go to bed and keep quiet, kids. Our guests are arriving in less than 5 minutes.(孩子们,你们必须 上床睡觉,不准吵闹。我们的客人5分钟之内就要到了。)
c) 能或不能发生的事情(接近can, may)
例:How am I to pay such a debt?(我怎么可能还得起这么大的一笔债呢?)
d) 不可避免将要发生的事情,后来将要发生的事情。
例:I assure you that the matter _______ as quickly as possible. Have a little patience.
A. will be attended B. will be attended to
C. is attended D. is attended to
will be attended to关键的一点是:attend表示“处理,解决”时是不及物动词,必须与to连用。另外,从上下文看,事情显然尚未解决,所以应该用将来时的被动语态。答案是B。
A) is to be B) can be C) will be D) has been
答案是A) is to be。全句的意思是:“如果要避免食品短缺,就必须作出更大努力来增加农业产量。”
E) 同样可以表示“正要、将要”的意思的句型是be on the point of doing。The coach is on the point of giving up the game because our team has been scored 7 points.
注意:
在以if, when, as long as, as soon as, after, before, in case, until, unless等连词以及具有连词作用的副词(immediately, the moment, directly)等引导的状语从句,一般用现在时代替将来时。强调延续性或动态时,可用完成时。
例:I hope his health will have improved by the time you come back next year.(我希望到明年你回来的时候,他的身体已经好多了。)
10. 将来进行时(will be doing) 调在将来的某个具体时间正在发生的动作或事情。
ex: Don't worry, you won't miss her. She will be wearing a red T-shirt and a white skirt at that time.
11. 将来完成时(will have done) 表示从将来的某一时间开始、延续到另一个将来时间的动作或状态,或是发生在某个将来时间,但对其后的另一个将来时间有影响的动作或状态。就好象把现在完成时平移到时间轴的将来时时段一样。其用法从和过去及现在有关,变成了和将来及将来的将来有关。
ex: It is reported that by the end of this century the people of Chinese will have increased by 2 billion.
❼ 英语时态,语法
还是抄建议买本语法书吧,一时半袭会也讲不清楚的。
语法书建议你买:高中英语语法表解大全 主编:霍荣会
【这个我觉得清晰最要紧,不要啰嗦到芝麻大点的都要说半天,表格类的可能会比较好,起提纲作用,细枝末节的东西再推荐一本,这样学起来就不会混乱了,查找有目的性】
还有词汇方面:高考英语必备。刘锐诚主编,这本书很好的,如果你的基本语法掌握了。这本书会让你有很大的提升,当然他想字典一样,平时做题目的是后遇到词语用法拿不准的,在这上面都可以找的。
我高中就是用刘主编的书,到现在还舍不得仍,一直保留着。现在上大学英语专业,希望我说的对你有帮助!
❽ 英语时态语法的用法
八种时态 主动语态 被动语态
一般现在时 (经常,反复,爱好,特点,条件,真理) do; does am;is;are done
一般过去时 (过去发生的事,不强调现在的结果) did; -ed was;were done
一般将来时 (将要发生的事) will do will be done
现在进行时 (现在正在发生的事) am;is;are doing am;is;are being done
过去进行时 (当时正在发生的事) was;were doing was;were being done
现在完成时 (过去发生的事,强调现在的结果) have;has done have;has been done
过去完成时 (过去完成的事;过去以前发生的事) had done had been done
过去将来时 (过去将要发生的事) would do would be done
八种时态:
• He is always ready to help others. 一般现在时
• She often came to help us in those days.一般过去式
• He is doing his homework now. 现在进行时
• At that time she was doing her homework.过去进行时
• I've written an article.现在完成时
• By the end of last month. We had reviewed four books 。过去完成时
• It is going to rain.一般将来时
• I asked who was going there. 过去将来时
一般现在时
1.概念:经常、反复发生的动作或行为及现在的某种状况。
2.时间状语: always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays,
3.基本结构:动词 原形 (如主语为第三人称单数,动词上要改为第三人称单数形式)
4.否定形式:am/is/are+not;此时态的谓语动词若为行为动词,则在其前加don't,如主语为第三人称单数,则用doesn't,同时还原行为动词。
5.一般疑问句:把be动词放于句首;用助动词do提问,如主语为第三人称单数,则用does,同时,还原行为动词。
6.例句:.
I am a student.——I am not a student.——Is she a student?
He knows the answer of my question.
He doesn’t know the answer of my question.
Does he know the answer of my question?
二、 一般过去时
1.概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。
2.时间状语:ago, yesterday, the day before yesterday, last week, last(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc.
3.基本结构:be动词;I was a student last year.
行为动词 的过去式I finished my homework yesterday
4.否定形式:was/were+not; I was not a student last year.
在行为动词前加didn't,同时还原行为动词。I didn’t finish my homework yesterday
5.一般疑问句:was或were放于句首;Were you a student last year?
用助动词do的过去式did 提问,同时还原行为动词。Didn’t they finish my homework yesterday?
三、 现在进行时
1.概念:表示现阶段或说话时正在进行的动作及行为。
2.时间状语:now, at this time, days, etc. look . listen
3.基本结构:be+doing He is doing his homework now.
4.否定形式:be+not+doing. He is not doing his homework now.
5.一般疑问句:把be动词放于句首。Is he doing his homework now.
四、 过去进行时
1.概念:表示过去某段时间或某一时刻正在发生或进行的行为或动作。
2.时间状语:at this time yesterday, at that time或以when引导的谓语动词是一般过去时的时间状语等。
3.基本结构 s+was/were+doing When he knocked at the door, his mother was cooking.
4.否定形式:s+was/were + not + doing. When he knocked at the door, his mother was not cooking.
5.一般疑问句:把was或were放于句首。(第一个字母大写)Was his mother cooking, when he knocked at the door?
五、现在完成时
1.概念:过去发生或已经完成的动作对现在造成的影响或结果,或从过去已经开始,持续到现在的动作或状态。
2.时间状语:yet,already,just,never,ever,so far,by now,since+时间点,for+时间段,recently, lately, in the past few years, etc.
3.基本结构:have/has + done
The countryside has changed a lot in the past few years. 这个农村在过去的几年里变化了很多
4.否定形式:have/has + not +done. The countryside has not changed a lot in the past few years.
5.一般疑问句:have或has。Has the countryside changed a lot in the past few years.
六、 过去完成时
1.概念:以过去某个时间为标准,在此以前发生的动作或行为,或在过去某动作之前完成的行为,即“过去的过去”。
2.时间状语:before, by the end of last year(term, month…),etc.
3.基本结构:had + done.
As soon as we got to the station, the train had left.
By the end of last month. We had reviewed four books.
4.否定形式:had + not + done. By the end of last month. We had not reviewed four books.
5.一般疑问句:had放于句首。By the end of last month. Had we reviewed four books.
基本结构:主语+had+过去分词(done)
①肯定句:主语+had+过去分词+其他
②否定句:主语+had+not+过去分词+其他
③一般疑问句:Had+主语+过去分词+其他
④特殊疑问句:特殊疑问词+一般疑问句
七、一般将来时
1.概念:表示将要发生的动作或存在的状态及打算、计划或准备做某事。
2.时间状语:tomorrow, next day(week, month, year…),soon, in a few minutes, by…,the day after tomorrow, etc.
3.基本结构:主语+am/is/are+going to + do;will/shall + do.
It is going to rain.
They will finish work tomorrow.
4.否定形式:am/is/are not going to do ;will/shall not do。
It is not going to rain.
They will not finish work tomorrow.
5.一般疑问句:be放于句首;will/shall提到句首。
Is it going to rain?
Will they finish work tomorrow?
Yes, they will.
No, they won’t.
八、 过去将来时
1.概念:立足于过去某一时刻,从过去看将来,常用于宾语从句中。
2.时间状语:the next day(morning, year…),the following month(week…),etc.
3.基本结构:was/were+going to + do;would/should + do.
They told me that they would go to work in Guangdong.
4.否定形式:was/were/not + going to + do;would/should + not + do.
They told me that they would not go to work in Guangdong.
5.一般疑问句:was或were放于句首;would/should 提到句首。
He said he was going there.
Was he going there?