一、原因状语从句：常用的引导连词有because,as和since

1、一、原因状语从句：常用的引导连词有because , as和sinceo一、原因状语从句:常用的引导连词有because , as和since。三者的区别是: 在回答问题的时候，使用because;对于显而易见的原因，常用as或since;as和since的从句常放在主句之前，而because的从句常放在主句之后。Why did you go? I went because Tom told me to go.你为何去，那是因为汤姆叫我去。He was angry not because we were late but because we made a noise. 他很生气不是因为我们来

2、迟了，而是因为我们弄出了声音。As it was raining hard, we had to be indoors.由于雨太大，我们只好呆 在家里。Since you feel 订1, you d better not go to work.既然你感觉不舒服， 你最好不要去上班了。注意:because是连词，引导原因壮语从句，不能与so连用；二because of是 短语介词，只能引导表示原因的短语。二、结果状语从句：引导结果状语从句的常用连词有：so-that/such/-that （如此以至于）;so that（结果）。常用句型为：so +形容词/副词+ thatso +形容词+ a/

3、an +单数可数名词+ thatsuch + a/an +形容词+单数可数名词+ thatsuch +形容词+复数可数名词+ thatsuch +形容词+不可数名词+ thatHe spoke so fast that I couldn t follow him.他讲得太快我跟不上。It was such a good day(=It was so good a day) that we all went swimming天气那么好，我们都去游泳了。The film was so wonderful that everyone was deeply moved电影是如此精彩，所有人都被深深打动

4、了。sothat与suchthat之间的转换既为so与such之间的转换。The boy is so young that he can, t go to schoolHe is such a young boy that he can, t go to school注意：so + many/much/ little(少)/few + 名词 + thatn 是习惯用法。三、目的状语从句引导LI的状语从句常用的连词有：that （以便），so that （以便），in order that（为了；以便）,Lest （免得;唯恐），for fear that（生怕；以免）。【例】Say it lo

5、uder （so） that everyone can hear you.大声说，以便大家都能听 到你。I am telling you that lest you should make a mistake.我告诉你这一点，以免你搞错。学习U的状语从句应注意以下两点：(1) U的状语从句中的谓语动词常用may (might), can (could), should等情 态动词。【例】I got up early so that I could catch the first bus.我起得很早，LI 的 是为了赶上头班公共汽车。(2) 在口语中so可以引导目的状语从句。【例】We 11 sit nearer the front so we can hear better. 我们坐的靠前一点， 因此，我们听得清楚一点。注：LI的状语从句可以用动词不定式来替换做LI的状语