状语从句课件 高中英语.ppt

Adverbial Clauses 1．引导原因状语从句最常用的连词是 because, since, 和as，所引导的从句可以放在主句之前，也可放在主句之后。其中 because语势最强，since次之，as又次之。 △ because通常表示说话人认为这种理由或原因是听话人所不知道的，全句强调的重点在原因上，不在主句表示的结果上。回答why提出的问题时，只能用because；在强调句型中也只能用because从句，不能用since, as等，如： Because I can’t see very well, I have to sit near the front. It was because he was ill that he didn’t go with us. It is because he was ill that he didn’t come. △ for 是并列连词，它引导的句子只能后置。表示因果关系时，可以和because 换用；但当它用于对主句的内容加以解释或推断时，不能用because 代替，如： He couldn’t have seen me, because / for I was not here. The ground is wet, for / because it rained last night. It rained last night, for the ground is wet this morning. △?because 之前可以加上simply, only, just 等强调词，如： You shouldn’t get angry just because some people speak ill of you. △?since 和as 引导的句子，重点在主句的内容，其原因或理由在说话人看来已很明显，或已为听话人所熟悉，since 和as 只是一种附带的说明原因，不是对原因进行强调，如： As he is working hard, he is likely to succeed. Since he can’t answer the question, you’d better ask someone else. As / Since he was not at home, I spoke to his brother. Since you insist, I will reconsider the matter. As he was in a hurry, he left his bag at home. 2．复合连词也可以引导原因状语从句，这些连词有：now (that), seeing (that), considering (that), for the reason that, by reason that, for fear that, that等，如： Now (that) (= Since) you mention it, I do remember. Now (that) he is absent, you’ll have to do the work by yourself. Now (=Since) the rain has stopped, let’s start. Seeing (that) all the guests have arrived, let’s have dinner. Considering that they are just beginners, they are doing quite a good job. She didn’t go for fear that she would get lost. He has done very well, considering (that) he has no experience. I haven’t finished writing the report yet, not that (= not because) I dislike the work, but that (= but because) I have not time. 3．在“主语+ be + 形容词+ that ”句型中，主语通常是人，形容词通常为：glad, happy, pleased, sorry 等表示感情的形容词，这时that 可以看作原因状语从句，如： We are glad that (= because) we have reaped another bumper harvest. I’m