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（1）當表達的含義是“為了”、“以便”時，為目的狀語從句；當表達的是“以至于”、“因此”含義時，為結果狀語從句。
If you do know, answer in a loud enough voice so that all the class may hear.(目的狀語從句)如果你的確知道，應大聲回答，以便讓全班學生都可以聽見。
It rained hard the day before yesterday, so that she had to stay at home.(結果狀語從句)前天雨下得很大，因此她只好呆在家里。
（2）當從句的謂語動詞有情態(tài)動詞can, could, may, might等時，是目的狀語從句；當從句里沒有情態(tài)動詞，且謂語動詞是一般現(xiàn)在時（過去時）、現(xiàn)在完成時等時態(tài)時，是結果狀語從句。
We stopped at Salt Lake City so that we could(might)visit the monument to seagulls. (目的狀語從句)我們在鹽湖城逗留，以便可以參觀為海鷗修的紀念碑。
They have walked a long way, so that we are all tired. (結果狀語從句)他們走了很長的路，所以都很累。
（3）當從句之前的so that可用in order that代替時，是目的狀語從句；反之，是結果狀語從句。
We now study hard so that we may work well in the future.(=We now study hard in order that we may work well in the future. (目的狀語從句)我們現(xiàn)在努力學習是為了將來更好地工作。
(4)當so that之前有逗號時，是結果狀語從句；反之，是目的狀語從句
The story is very interesting, so that I like it very much.(結果狀語從句)這部小說很有趣，因而我非常喜歡。
八、比較狀語從句
比較狀語從句一般由as…as(和一樣)，not as/so…as(與……不一樣)，than(比),the more…, the more…(越……越……)引導。
The director gave me a better offer than he gave Dick.導師給我的提議比給狄克的好。
In recent years travel companies have succeeded in selling us the idea that the further we go, the better our holiday will be.近幾年旅游公司已成功地對我們灌輸了去得越遠，假日越好的觀點。
John plays football as well as, if not better than, David. 如果說約翰的足球踢的不比大衛(wèi)好，至少和他踢的一樣好。
I can't run as/so fast as he can. 我不能跑得他那樣快。
巧學Than后面的代詞是用主格還是用賓格?
下列兩句中，than分別用了I和me，兩者都正確：
①She is older than me.(口語中常用)
②She is older than I(am)(較正式文體常用)
但是，在有些句子中，用主格和用賓格，句子會截然不同。
①John likes Henry more than I.
②John likes Henry more than me.
我們知道，than用作連詞，它的后面省略了一個比較(方式)狀語從句。現(xiàn)在我們把以上兩句補充完整。
①John likes Henry more than I like Henry.
②John likes Henry more than he likes me.
看得出，第一句的意思是：約翰比我更喜歡亨利。第二句的意思是：約翰喜歡亨利勝過喜歡我。那么，在什么情況下，than后面的人稱代詞用主格？什么情況下用賓格？
一、如果主句謂語是不及物動詞，than后面的人稱代詞用主格或賓格均可，且意義無區(qū)別。
She draws better than I(me).它畫得比我好。要注意：如果人稱代詞后面有all時，人稱代詞一般用賓格。
She draws better than them all.
二、如果主句謂語是及物動詞，且than后面的名詞或代詞又與動詞連用時，than后面的人稱代詞只能用主格。
He loves the dog more than his wife does.他比他的妻子更愛這條狗。
三、如果主句謂語是連系動詞be, than后面的人稱代詞用主格或賓格均可，且意義無區(qū)別。
He is taller than I(me).他比我長得高。
四、如果主句謂語是及物動詞，特別是like, love, hate等及物動詞，than后面的人稱代詞用用主格或賓格均可， 但句意不同。邏輯上，這些及物動詞既能與人稱代詞構成“主謂關系”，又能構成“動賓關系”。因此，用主格時，后面省去了主句中的謂語和賓語；用賓格時省去了句子的主語和謂語。
I like the boy better than she.=I like the boy better than she likes the boy.我比她更喜歡那個男孩。
I like the boy better than her.=I like the boy better than I like her.我喜歡那個男孩勝過喜歡她。
九、讓步狀語從句
讓步狀語從句由though，although，as，even if (though)，however，whatever，whoever，whenever，no matter +wh詞，等引導。
1、even if, even though, although，though引導的讓步狀語從句
這四個詞（詞組）都有“雖然、即使、盡管”的意思。even if和even though帶有較強的意味，語氣比although和though強。though比although通俗，但不如although正式,都不能和but連用，但可以和yet, still或nevertheless連用?？梢苑旁谥骶淝懊嬉部梢苑旁谥骶浜竺?。even if，even though所接的句子常用虛擬語氣。
Although journalism seems like a good profession，I would prefer to be a teacher．雖然新聞業(yè)好像是一個很好的職業(yè)，但是我更喜歡當老師。
Although he is considered a great writer，his works are not widely read.雖然有人認為他是一個大作家，但是他的作品讀得并不廣泛。
We won't give up even if we should fail ten times.即使是我們失敗十次，我們也不會放棄。
He might have given you more help，even though he was very busy．盡管他很忙，他可能給了你更多的幫助。
2、as或though引導讓步狀語從句
（1）由as或though引導讓步狀語從句用倒裝語序
Much as I have traveled，I have never seen anyone who's as capable as John.我雖然取得地方多，但是我從來沒見過像約翰這么能干的人。
Proud as these nobles are, he is afraid to see me.這些貴族盡管很傲慢，他們卻害怕見我。
（2）如果表語為單數(shù)可數(shù)名詞，這個名詞不帶冠詞
12-year-old girl as she is, she has had a good command of English.她雖然只是個12歲的女孩，但是她已經(jīng)熟知英語。
Child as he is，he knows a lot.雖然他還是個孩子，卻懂的很多。
(2)如果句中謂語包含情態(tài)動詞或助動詞，則將實意動詞放在as之前
Try as I might，I couldn't lift the stone.我使多大勁兒也搬不動這塊石頭。
Praised as he was, he remained modest.他雖然受到表揚，但仍然保持著謙虛。
（4）如果句中謂語僅有實意動詞，則將實意動詞(原形)放在as之前，并在主語后面加助動詞do, does, did或will。
Torture her as they did, the enemy got nothing out of her.雖然敵人拷打她，卻沒有能從她嘴里得到什么。
Fail as he did, he would never give up.盡管他失敗了，但他決不會放棄。
注:但是，如果在這種情況下，句中謂語有副詞修飾，則將副詞放在as之前。
Again and again as he failed, he didn't lose heart.他雖然多次失敗，但仍不灰心喪氣。
Much as I admire his courage, I don't think he acted wisely.我雖然佩服他的勇氣，但是我認為他這樣做是不明智的。
3、由no matter+ wh詞和由疑問詞＋ever引導讓步狀語從句
由no matter引導，表示“不管；無論”；由疑問詞＋ever引導，表示“不管，不論”。這類詞有：whatever，whichever，whoever，however， whenever，wherever等,他們相當于no matter+ what（which，who，how，when， where），都不能與but，so，and等并列連詞同時使用。
We'll have to finish the job, however(no matter how) long it takes. 不管需要多長時間，我們都一定完成這項工作。
No matter what(Whatever) you do, don't tell him that I told you this. 無論你做什么，別告訴他我對你說過這件事。
No matter how pure the water looks, I prefer not to drink it. 不管這水看起來多么純凈，我不喜歡喝它。
No matter where (Wherever) you go, I would keep you company.不管你到哪去，我都會陪著你。
注意：no matter 可以和whether和if連用。
No matter whether(if) it snows or not, I shall start on the journey.不論下雪與否，我都將出發(fā)去旅行。
4、由whether．．．or引導讓步狀語從句
由whether．．．or引導讓步狀語從句表示“不論……還是”，提供兩種對比的情況。
I shall go, whether you come with me or stay at home. 不論你和我一起來還是留在家中，我都要前往。
Whether we like a particular piece of news or not, all we have to do is sit in front of the tube and “l(fā)et it happen”.不管我們喜歡不喜歡一條消息,我們所能做的只是坐在電視機前，“讓它過去”。
十、條件狀語從句
條件狀語從句可以位于主句前面或后面。
1、 由if，unless引導
if 表示正面的條件，意為“如果”；unless表示反面的條件，意為“除非，如果不”（if not）
You will be late unless you leave immediately.除非你立即走，否則，你會遲到。
The WTO can not live up to its name if it does not include a country that is home to one fifth of mankind.世貿(mào)組織如果不讓一個擁有世界五分之一人口的國家加入，那它就名不符實。
If you don't hurry up, you'll be late. 如果你不快點，你就會晚了。
We'll go there unless it rains. 如果不下雨，我們就去那兒。
2、由suppose，supposing，as/so long as， providing, provided, on condition that和in case等引導
這類連詞（詞組）意思相近，有：“如果、假設、即使、在……條件下”等意義。
Suppose (Supposing) he is ill, what shall we do? 如果他病了，我們該怎么辦？
You'll do all right, as long as you follow his advice.只要你聽從他的勸告，你就會干得很好的。
In case John comes, please tell him to wait.假如約翰來了，請讓他稍候。
You may keep the book a further week provided (that) no one else requires it. 倘若這本書沒有其他人想借的話，你可以再續(xù)借一個禮拜。
十一、方式狀語從句
方式狀語從句一般由as(正如；按照)，as if/as though(好像),the way等引導。
1、as 和just as引導方式狀語從句
這兩個連詞的意思是“如…，猶如…，正如…”（in the same manner that）。just as 比as的強調性更強。
You must do everything as I do.你們要照我這樣去做。
Just as the water is the most important of liquids, air is the most important gases.正如水是液體中最重要的一種一樣，空氣是氣體中最重要的一種。
2、as if 和as though引導方式狀語從句
as if 和as though意為“好像、仿佛”可以用虛擬語氣表示不符合事實或與事實相反的情況；也可以用陳述語氣表示符合事實的情況。
He walked slowly as if he had hurt his leg. 他走得很慢，好像腿受了傷。
He spoke as if he knew the question very well.他說得好像對這個問題知道得很清楚。
She speaks English as if she were a native speaker.她講英語儼然像專家。
注意：在It looks as if...,It seems as if...句型中常用陳述語氣。
It looks as if it is gong to rain.天看上去好像要下雨。
3、the way引導方式狀語從句
the way它的作用相當于the manner，后面的引導詞常用that引導方式狀語，而且經(jīng)常省略。此時，一般不用in which引導。
I don’t like the way you speak to her.我不喜歡你和她說話的方式。
We didn't like the way that he treated us. 我不喜歡他對待我們的方式。
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來自： 昵稱17105374 > 《英語初中》
