⑴宾语从句可用that引导,这时that仅起连接作用,不充当从句中的成分。如果连接词要在从句中起语法作用,就要使用连接词what等来引导从句。
I believe that he is honest. We fully understood what he meant.
⑵有些形容词的后面也可跟宾语从句。这类形容词有:certain,afraid,aware,sorry,sure,worried等。如:
Im afraid that you are wrong on this point. I am aware that you have been exceptionally kind to me.
⑶宾语从句也可以用how,when,who,which,where,why等词引出,此时即使主句是一个疑问句,宾语从句也必须保持陈述句的语序。如:
Go and ask why he was late yesterday. Can you tell me where the hospital is?
⑷跟在介词后面的宾语从句一般不能由that来引出,只限于except,in,but,besides,save等五个介词的宾语从句,其它介词后面不能跟由that引出的宾语从句,而只能跟由what,how,whether等引出的宾语从句。
You are wrong in that you took effect for cause. I would go with you,except that I have to work that day. They were arguing about what was to be done. Im thinking of whom I should ask for help.
3. 表语从句表语从句通常由that引出,当然how,why,where,when等也可以引出表语从句。常见的表语从句有下面两种句型:
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