Ⅰ 求英語必修三 Unit4的短文翻譯
地球上生命的起源
沒有人確切知道地球是怎樣開始形成的，因為在很早很早以前地球就形成了。然而，一種普遍為人們所接受的理論是；宇宙起源於一次大爆炸，這次大爆炸講物質投射到四面八方。然後，原子形成並結合成恆星和其他天體。
大爆炸後好幾十億年過去了，但地球還只是一團塵埃。隨後他會變成什麼沒人能知道，知道38-35億年錢，這團塵埃才慢慢形成一個固體的球狀物。地球開始變得激烈動盪，不知道這個固體形狀是否會繼續存在下去。它猛烈的爆炸噴出了烈火與岩石。最終產生了碳、氮氣、水蒸氣和其他多種氣體，從而形成了地球的大氣層。更為重要的是，地球冷卻了下來，地球的表面就開始出現了水。
在火星這些其他行星上都出現了水，但和地球不同的是，遮羞水後來都消失了。水會對生命的發展起關鍵作用，這一點在當時並不明顯。很多科學家相信，由於地球上長期有水存在，它使得地球得意把有害氣體和酸性物質溶解在海洋里。這就產生了一系列的反應，使得生命就有可能發展下去。
好幾百萬年以後，水的表面開始出現了極小的植物。他們繁殖起來就使得早期的海洋充滿了氧氣，這為早期的貝類及其他各種魚類的發育進一步創造條件。接著，綠色植物開始出現在陸地上。隨後，陸地上出現了動物，其中有一些是昆蟲，另外一些叫兩棲動物，他們既能在陸上生活，也能在海里生存。後來，當植物長大成了森林的時候，爬行動物出現了。他們一般是通過孵蛋而繁衍後代的。再後來一些叫做恐龍的巨型動物出現了。它們也生蛋，在地球上生存了一億四千多萬年。然而，六千五百萬年前，恐龍時代結束了。它們為什麼會突然滅絕，至今仍然是個謎。恐龍的滅絕使得地球上的哺乳動物的產生變得可能。哺乳動物不同其他以往所有的動物，因為他們可以在體內生產出幼仔並給幼仔哺乳。
最後，大約260萬年前，一些小巧聰明、長著手腳的動物出現了，它們散布在地球的各個地方。於是，他們接著成為了這個行星上最重要的動物。然而，他們對地球卻不怎麼在意。他們把過多的二氧化碳釋放到大氣層中，這使得地球上的熱不能釋放到太空中去。因此許多科學家相信地球可能會變得太熱而不適合生物的生存。所以，在未來的數百萬年中，生命可否在地球上延續取決於這個問題是否能得到解決。
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這字敲得太累了。。。╮(╯▽╰)╭
Ⅱ 急！！高一英語必修三Unit4句型轉換
1 lucky enough to 2to be studying 3 break up
Ⅲ 高中英語必修三，四有哪些語法，知識點
高中英語必修三，四有哪些語法，知識點
主要有虛擬語氣，情態動詞，非謂語，定語從句，名詞性從句，狀語從句，動詞時態，強調句型，倒裝句，倒裝等。
Ⅳ 求高中英語必修三，unit4的重點句！！
However, according to a widely accepted theory, the universe began with a 「Big Bang」 that threw matter in all directions.
What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the st settled into a solid globe.
The earth became so violent that it was not clear whether the shape would last or not.
They were in time to proce carbon, nitrogen, water vapor and other gases, which were to make the earth』s atmosphere.
What is even more important is that as the earth cooled down, water began to appear on its surface.
It was not immediately obvious that water was to be fundamental to the development of life. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.
Why they suddenly disappeared still remains a mystery.
They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.
So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.
這里很多句子都是涉及到名詞性從句。
Ⅳ 人教版新課標高中英語必修三單詞unit4
sorry , i can ';t help you for having no this book now
Ⅵ 英語必修三人教版unit4 learning about language28頁1 2 3題的答案
l have to wear ---uniform when lm at ------school lts one of the school rules
Ⅶ 高一英語必修三必修四所有語法
高中英語主要是對 完成時 的擴展和各種從句（主語，謂語，賓語，定語，強調句，同位語）的進一步講解，具體問題還是通過習題理解比較好
Ⅷ 高中英語必修3UNIT4 語法
主語從句
一、 名詞性從句概述：
在句子中起名詞作用的句子叫名詞性從句(Noun Clauses）。名詞性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、介詞賓語等，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。
名詞性從句的連詞
連接詞：that，if/whether(是否)，
連接代詞：what, whatever, who, whoever, whom, whomever, whose, which, whichever
連接副詞：when, where, how, why, whenever, wherever, however
二、主語從句的連詞分三類
（1）從屬連詞引導的主語從句 （that whether if）
that引導的主語從句:引導詞that無含義/在句中不做成分/不可以省。That 引導主語從句通常用it 作形式主語。
例如：That you will win the medal seems unlikely.
That you are so indifferent bothers me.
That she survived the accident is a miracle.
whether 引導的主語從句: whether有含義(是否)/在句中不做成分/不可以省。
注意：引導主語從句，不能用if不能在開頭，只能用whether。
Whether we will hold a party in the open air tomorrow depends on the weather.
Whether she is coming or not doesn』t matter too much.
（2） 用連接代詞引導的主語從句
在由連接代詞who, whose, whom, which, what, whoever, whomever, whichever, whatever引導的名詞性從句中，其連接代詞在句中起名詞性作用，擔當一定成分.
例如：What you need is more practice.
What I want to know is this.
Whatever we do is to serve the people.
註：whatever / whoever的功用
whatever, whoever在主語從句中不含疑問意義。它引導主語從句，並在從句中作主語、賓語、表語等。
whatever = anything that; whoever = anyone who。要注意和whatever, whoever引導的讓步狀語從句的區別。
如：
Whoever breaks the law should be punished. （主語從句）
（ ＝Anyone who breaks the law should be punished. ）
Whoever breaks the law, he should be punished. （讓步狀語從句）
（ ＝No matter who breaks the law, he should be punished. ）
（3）用連接副詞when, where, why, how引導的名詞性從句(其連接副詞有含義,在句中作狀語。)
例如:Where we should leave it is a problem.
When they will come hasn』t been made pubic.
三、it 作形式主語的主語從句
有時為了考慮句子平衡，通常在主語從句處使用形式主語it，而將真正的主語從句移至句末。這分四種情況：
(1) 對於以連詞that引導的主語從句，通常用形式主語it替代主語從句：
<a> It is +名詞+從句
It is a fact that… 事實是……
It is good news that … ……是好消息
It is a question that … ……是個問題
It is common knowledge that … ……是常識
類似的名詞還有：a pity；a wonder；a good thing； no wonder； surprise等。
It is a mystery to me how it all happened.
It is common knowledge that the whale is not a fish.
It is no surprise that Bob should have won the game.
It』s a pity that you missed the film.
<b> It is +形容詞+從句
It is necessary that … 有必要……
It is clear that … 很清楚……
It is likely that … 很可能……
It is important that … 重要的是……
類似的形容詞還有：strange; natural; obvious; true; good; wonderful; possible; unlikely; quite; unusual; certain; evident; worth-while; surprising; interesting; astonishing, etc.
It is doubtful whether she will be able to come.
It was really astonishing that he refused to talk to you.
It is essential that he should be here by the weekend.
It seems obvious that we can not go on like this.
It is necessary that you （should）master the computer.
It is important that a student learn English well.
It』s clear that they badly need help.
It is likely that a hurricane will arrive soon.
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。
<c> It is +過去分詞+從句
It is said that … 據說……
It is reported that … 據報道……
It has been proved that … 已證明……
It must be proved that… 必須指出……
類似的過去分詞還有：known; estimated; expected; believed; thought; hoped; noted; discussed; required; decided; suggested; demanded; made clear; found out,etc.
例如：It is thought that he is the best player.
It is estimated that the vase is 2000 years old.
It is used to be thought that a new star must be e to a collision between two stars.
It has not been made clear when the new road is to be opened to traffic.
It is said that he was killed in the earthquake.
<d> It seems不及物動詞 （happened / appears / doesn』t』t matter / makes no difference / occurred …）that …主語從句不可提前
It seems that they will win the game.
It makes no difference whether he will attend the meeting or not.
It does not matter if I missed my train.
It happened that I saw him yesterday.
(2) 對於以連接代詞(副詞)引導的主語從句，可以使用形式主語代主語從句，也可直接在句首使用主語從句：
Whether they would support us was a problem.
他們是否會支持我們還是一個問題。
It was a problem whether they would support us.
他們是否會支持我們還是一個問題。
It remains to be seen whether it will do us harm or good.
它對我們是利是害，還得看看再說。
(3) 對關系代詞型what引導的主語從句，通常直接將主語從句放在句首。如：
What we need is money. 我們需要的是錢。
What I want to know is this. 我想知道的就是這一點。
有時也可將助用形式主語。如：
It is clear enough what he meant. 他是什麼意思很清楚。
(4) 如果句子是疑問句，則必須用帶形式主語it的結構：
Is it true that he is the girl』s father? 他是那女孩的父親，是真的嗎？
How is it that you are late again? 你怎麼又遲到了？
四、連詞that的省略問題
引導主語從句的連詞that 有時可省，有時不能省，其原則是：若that引導的主語從句直接位於句首，則that不能省略；若that引導的主語從句位於句末，而在句首使用了形式主語it，則that可以省略：
That you didn』t go to the talk was a pity. 很遺憾你沒去聽報告。(that不可省)
It was a pity (that) you didn』t go to the talk. 很遺憾你沒去聽報告。(that可省)