2019年12月四级语法知识点：原因状语从句

2019年12月四级语法知识点：原因状语从句

原因状语从句

连接词：because, since, as, for ，now that, in that, owing to, due to, thanks to, because of , as a result of; 比较：because, since, as和for

1) because语势，用来说明人所不知的原因，回答why提出的问题。当原因是显而易见的或已为人们所知，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引导的从句如果放在句末，且前面有逗 号，则能够用for来代替。但如果不是说明直接原因，而是多种情况加以推断，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 ：因为，通常只能放在句中，强调重要的，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等短语后面只能接词或短语，不能接从句