2016年6月英語四級(jí)語法精講：原因狀語從句

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原因狀語從句

連接詞：because, since, as, for ，now that, in that, owing to, due to, thanks to, because of , as a result of;

比較：because, since, as和for

1)　because語勢最強(qiáng)，用來說明人所不知的原因，回答why提出的問題。當(dāng)原因是顯而易見的或已為人們所知，就用as或 since。

I didn't go, because I was afraid.

Since /As the weather is so bad, we have to delay our journey.

2)　由because引導(dǎo)的從句如果放在句末，且前面有逗 號(hào)，則可以用for來代替。但如果不是說明直接原因，而是多種情況加以推斷，就只能用for。

He is absent today, because / for he is ill.

He must be ill, for he is absent today.

now that ：既然;

in that :因?yàn)?，通常只能放在句中，?qiáng)調(diào)重要的，唯一的的原因;

eg：Now that this semester is finished, I am going to rest a few days and take a trip.

Human beings are different from animals in that human can speak and think.

owing to, due to, thanks to, because of , as a result of等短語后面只能接詞或短語，不能接從句;

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