北師大版高中英語(yǔ)必修2Unit 5 lesson 3：
Adberbial Clauses (cause & result &purpose )
一、AdberbialClauses of Cause 原因狀語(yǔ)從句
連詞有：because,since, as；now that, in that, seeing that, consideringthat；when等。
(一)because, since, as
1.表示不知道的原因時(shí)用because,通常它被置于主句之后。
You want to know why I’m leaving? I’m leaving because I’mfull.
2. for是并列連詞。如果不是因果關(guān)系，而是對前面主句的內容加以解釋或推斷時(shí)，只能用for。
It’s morning now, for the birds are singing.
3. 表示已經(jīng)知道的原因時(shí)用as或since,since要比as正式一些，它們通常被置于語(yǔ)句之前，但有時(shí)卻相反。
Since /As the weather is so bad, we have to delay ourjourney.
4. 下列情況下只能使用because:
①在回答why的問(wèn)句時(shí)；
---Why did you not come yesterday?
---Because I was ill.
②在用于強調句型時(shí)；
It was because I was ill that I didn’t comeyesterday.
③被not所否定時(shí)。(“not... because”結構中的not否定的是because引導的整個(gè)從句)
The country is not strong because it is large.國強不在大。
(二)now that, in that, seeing that, consideringthat
(這幾個(gè)詞匯與since引導的原因狀語(yǔ)從句意思相近,都表示“既然”。)
Now that you are grown up, you should not rely on yourparents.
既然你長(cháng)大了，就不應該依靠你的父母了。
His request is unreasonable in that he knows we can't affordit.
他的要求是不合理的,因為他知道我們負擔不起。
Seeing that he was a hard worker, he achieved alot.
他辛勤工作,因而取得了不少成就。
Considering that it is handmade , the price seems reasonable.
考慮到它是手工織成的，價(jià)格還算合理。
(三)when既然
Why use wood when you can use plastic? 既然能用塑料,為什么還要用木料?
二、AdberbialClauses of Result 結果狀語(yǔ)從句
連詞有：so...that,such ... that;
(一)so …that
1. so + adj / adv + that從句
She is so lovely that we all like her. 她是如此可愛(ài)，我們都喜歡她。
The boy ran so fast that I couldn’t catchhim.男孩跑得如此快，我趕不上他。
2. so + adj + a(n) + n. +that從句
She is so lovely a girl that we all like her.她是如此可愛(ài)的女孩，我們都喜歡她。
3. so + many / much / few / little + n+that從句
There was so much work to do that everybody gotbored.有這么多事情要做，每個(gè)人都感到厭煩了。
(二)such …that
1. such + a(n) + adj. + n. + that…
It was such a fine day that nobody wanted to stay athome.天氣這么好，沒(méi)有人愿意呆在家里。
2. such + adj. + n. (pl.) + that…
They are such good students that the teacher likesthem.他們都是好學(xué)生，老師喜歡他們。
3. such + adj. + n.(U) + that…
It was such fine weather yesterday that we wentswimming.昨天天氣很好，我們都去游泳了。
(三)so that結果,以致
Everyone lent a hand, so that the work was finished ahead oftime.
每個(gè)人都幫了忙,所以工作提前完成了。
三、AdberbialClauses of Purpose 目的狀語(yǔ)從句
連接詞：so that,in order that;
(一)so that, in order that
I spend more time learning English every day so that(= in orderthat) I can make greater progress this year.
為了今年取得更大進(jìn)步，我每天用了更多的時(shí)間學(xué)英語(yǔ)。
(當從句與主句主語(yǔ)一致時(shí),可將從句變換為soas to, in order to 短語(yǔ);in order that/in order to引導的從句可放在主句前)
(二)in case萬(wàn)一,以防
Keep the window closed in case it rains. 把窗戶(hù)關(guān)好,以防下雨。
Take warm clothes in case the weather is cold.穿上暖和的衣服,以防天冷。
Wait outside in case you can be useful. 在外面等,也許你可以幫點(diǎn)忙。
(三)lest唯恐，以免；forfear that唯恐，害怕(從句中須用“should+動(dòng)詞原形”，表虛擬語(yǔ)氣)
He spent whole days in his room, lest he (should) disturbanyone. 他整天呆在屋里，以免打擾別人。
He works hard for fear that he (should) fail.他怕失敗，因此工作很努力。
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