初中英语语法知识点详解及练习：宾语从句

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初中英语语法知识点详解及练习：宾语从句
        一个句子如果加上宾语从句，句子显然变复杂了，也变的difficult了，其实，你大可不必发愁。只要掌握好宾语从句的用法，一切问题就迎刃而解了。
        宾语从句由关系代词或关系副词引出。我们根据引导宾语从句的连词不同，可把宾语从句分为三类。
        以that引导的宾语从句。 　　 如：I hear that you have passed the examination. Good luck!
        以if 和whether引导的宾语从句。　　 如：I don't know if you can come tomorrow.
        以连接代词或连接副词引导的宾语从句。　　 如：Please tell me how you can get here.
        运用宾语从句要注意以下几点：
        宾语从句的语序一定是陈述句语序。
        主句的谓语动词的时态如果是过去时态，宾语从句谓语动词的时态要选用相应的过去某一种形式。
        如果宾语从句表示的是客观真理，事实时，即使主句是过去式，从句仍用一般现在时。
        练习：
        1. She asked me if I knew _______.
        A. whose pen is it
        B. whose pen it was
        C. whose pen it is
        D. whose pen was it
        2. I don't know _______ he still lives here after so many years.
        A. whether
        B. where
        C. what
        D. when
        3. I don't know ______ he will come tomorrow. _______ he comes, I'll tell you.
        A. if, whether
        B. whether, whether
        C. if, That
        D. if, If
        4. The small children don't know ________.
        A. what is their stockings in
        B. where is in their stockings
        C. where is their stocking in
        D. what in their stockings