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1、高中英語(yǔ)狀語(yǔ)從句講解匯總原因從句除了下面A2, A3中所示各種類型外，這兩種從句均可由as或because來(lái)引導(dǎo)。但是用as引導(dǎo)原因從句較為穩(wěn)妥（參 見(jiàn)A）：用because引導(dǎo)結(jié)果/原因從句較為穩(wěn)妥（參見(jiàn)B）。A原因從句1 tb as/because/ since引導(dǎo)的原因從句：We camped there as / because / since it was too dark to go on.我們?cè)谀抢锫端奘且驗(yàn)樘焯?，不能再繼續(xù)往前走了。As / Because / Since it was too dark to go on, we camped there.因?yàn)樘焯诓荒茉倮^續(xù)

2、往前走，我們就在那兒露宿了。2 in view of the fact that 可用 as / since / seeing that 來(lái)表示,但不能用 because：As / Since / Seeing that you are here, you may as well give me a hand.既然你在這兒，你就幫我個(gè)忙吧。As / Since / Seeing that Tom knows French> he' d better do the talking.既然湯姆懂法語(yǔ)，最好讓他來(lái)談。3在as/since/seeing that意指以前共知的或共知的陳述時(shí)

3、，可用if來(lái)代替：As / Since / Seeing that / If you don' t like Bilh why did you invite him?既然/如果你不喜歡比爾，你為什么邀請(qǐng)了他？注意：if so的用法：I hope Bill won' t come.If so （=If you hope he won' t come）, why did you invite him?一我希望比爾別來(lái)。如果這樣"如果你希望他不來(lái)），你為什么邀請(qǐng)了他？關(guān)于if+so/not,參見(jiàn)第347節(jié)。B結(jié)果從句 由because或as引導(dǎo)：The fuse b

4、lew because we had overloaded the circuit.保險(xiǎn)絲燒斷了，因?yàn)槲覀兪咕€路超載了。He was angry because we were late.他生氣是因?yàn)槲覀儊?lái)晚了。As it froze hard that night there was ice everywhere next day.因?yàn)槟翘焱砩侠涞脜柡?，所以第二天到處都是冰。As the soup was very salty we were thirsty afterwards.因?yàn)檫@湯很咸，后來(lái)我們渴得厲害。C這種組合也可用so連接兩個(gè)主句的形式來(lái)表示：It was too dark t

5、o go on, so we camped there.天太黑了，不能繼續(xù)往前走了，所以我們就在那兒露宿了。You are here, so you may as well give me a hand. 你們既然在這兒，不如就幫我一下。It froze hard that night, so there was ice everywhere next day.那天夜里冷得歷害，所以第二天到處都是冰。也可以使用therefore,但只限用于非常正式的句子中：The Finnish delegate has not yet arrived. We are therefore postponing

6、 / We have therefore decided to postpone / Therefore we are postponing the meeting.芬蘭代表還沒(méi)有到達(dá)。我們因此要把會(huì)議推遲/因此我們已決定把會(huì)議推遲/因此我們要把會(huì)議推遲。（注意 therefore可以放在幾個(gè)不同的位置such / sothat引導(dǎo)的結(jié)果從句Asuch是形容詞，用于形容詞+名詞結(jié)構(gòu)之前：They had such a fierce dog that no one dared to go near their house.他們有一條如此兇猛的狗，以致沒(méi)人敢靠近他們家。He spoke for s

7、uch a long time that people began to fall asleep.他說(shuō)了這么長(zhǎng)時(shí)間，以致在座的人都犯困了。Bs。是副詞，用于副詞和不帶名詞的形容詞之前：The snow fell so fast that our footsteps were soon covered up.雪下得這么快，以致我們的腳印很快就被雪蓋住了。His speech went on for so long that people began to fall asleep.他的講話這么長(zhǎng)，以致在座的人都開(kāi)始犯困了。Their dog was so fierce that no one da

8、red come near it.他們的狗太兇猛了，所以沒(méi)人敢靠近它。但such不能用于much和many之前，所以so可用于后跟名詞的much和many之前：There was so much dust that we couldn? t see what was happening.灰塵太大了，使得我們看不清發(fā)生了什么事。So many people complained that they took the programme off.抱怨的人太多，所以他們?nèi)∠四莻€(gè)節(jié)目。C注意：such+a+形容詞+名詞可由so+形容詞+a+名詞來(lái)代替，所以such a good man可由so go

9、od a man來(lái)代替。 這只能在名詞前面有a/an的情況下使用。這種形式不常見(jiàn)，但有時(shí)出現(xiàn)在文學(xué)作品中。有時(shí)為了表示強(qiáng)調(diào)，so位于句首。這時(shí)后面跟動(dòng)詞的倒裝形式：So terrible was the storm that whole roofs were ripped off.暴風(fēng)真可怕，把整個(gè)的屋頂全都刮飛了。讓步從句它們由下列詞來(lái)引導(dǎo):althought thought even though, even if, no matter» however （參見(jiàn)第85節(jié)有時(shí)也可以使 用whatever。as也可以，但是只限于形容詞+as+be結(jié)構(gòu)。Although / Tlwug

10、h / Even though / Even if you don' t like him you can still be polite.盡管/即使/縱然/即使你不喜歡他，你仍可有禮貌一些。No matter what you do, don' t touch this switch.無(wú)論怎樣，都別碰這個(gè)按鈕。However rich people are, they always seem anxious to make more money.無(wú)論人們多么富有，他們似乎總還渴望賺到更多的錢。However carefully you drive, you will prob

11、ably have an accident eventual- ly.無(wú)論你開(kāi)車多小心，最后你大概還會(huì)出車禍。Whatever you do, doif t tell him that I told you this.無(wú)論如何，別跟他說(shuō)這件事是我告訴你的。Patient as he was, he had no intention of waiting for three hours.哪怕他再有耐心，也不打算等上三個(gè)小時(shí)。may+動(dòng)詞原形可用于假設(shè)情況：However frightened you may be yourself, you must remain outwardly calm.

12、無(wú)論你有多害怕，外表上你仍要保持冷靜。may含有I accept the fact that (我接受這一事實(shí))的意思：But he' s your brother!He may be my brother but I don' t trust him!一可他是你的兄弟！盡管他是我的兄弟，可我不信任他！但may這樣用時(shí)，是另一主句的一部分，并不屬于讓步從句之列。should+動(dòng)詞原形結(jié)構(gòu)可用于even if之后，正如 用于條件句的if之后一樣，用來(lái)表示should后而的動(dòng)詞原形所指的動(dòng)作不太可能發(fā)生：Even if he should find out he won'

13、t do anything about it.即便他發(fā)現(xiàn)了，他也不會(huì)采取什么行動(dòng)的。比較從句A形容詞和限定動(dòng)詞連用時(shí)的比較It' s darker today than it was yesterday.今天比昨天天色昏暗。He doesn' t pay as much tax as we do / as us.他沒(méi)我們交的稅款多。He spends more than he earns.他花的比掙的多。注意：that+形容詞是一種口語(yǔ)形式，表示“那么”：Will it cost £100?一No, it wonf t cost as much as (all) th

14、at. It won, t be (all) that expensive. /It won' t be as expensive as that.一要花100英鎊嗎？一不，花不了那么多。沒(méi)那么貴。that +形容詞結(jié)構(gòu)有時(shí)用于口語(yǔ)中表示very (很)的意思。B副詞和限定動(dòng)詞連用時(shí)的比較He didn' t play as well as we expected / as well as you (did).他打得不如我們預(yù)料的好/你打得好。He sings more loudly than anyone V ve ever heard / than anyone else

15、(does).他唱得比我聽(tīng)到的任何人唱得都響/比任何人都聲音響。You work harder than he does / than him / than I did at your age.你比他干得賣勁/我在你這個(gè)年齡時(shí)干得賣勁。C形容詞和不定式或動(dòng)名詞連用時(shí)的比較：通常兩者都可使用，但動(dòng)詞不定式常常用于特定的動(dòng)作，動(dòng)名詞則用于一般情況(參見(jiàn)下而E)：It' s sometimes as cheap to buy a new one as (it is) (to) repair the old one.Buying a new one is sometimes as cheap as repairing the old one.有時(shí)買一個(gè)新的跟修理舊的一樣便宜。He found that lying on the beach was just as boring as sitting in his office.He found lying on the beach just as boring as sitting etc.他發(fā)現(xiàn)躺在沙灘上和坐在辦公室里一樣沒(méi)趣/煩人。He thinks it (is) safer to drive himself than (to) let m