这篇大学英语六级语法辅导讲解了because, since等连接词引导的原因状语从句，希望大家在学习了这篇文章后能够区分开它们的用法!
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语势最强，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，则可以用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，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等短语后面只能接词或短语，不能接从句;
以上就是大学英语六级语法辅导的全部内容，希望大家熟练掌握，能够深入地理解原因状语从句！
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