the object clause
宾语从句 （主句+连词+宾语从句）
1·什么是宾语：动作的对象或者内容。
she said a few words
she said that she would not come to my party.
2. 什么是宾语从句： 一个句子用来做宾语，就是宾语从句。
3. 从三个方面讲解宾语从句： 引导词，时态，语序。
1）引导词
引导词的选择取决于从句是一个什么样的句子。
从句是陈述句---that引导（在句子中不做任何成分，可省略）
i think that you are right/
从句是一般疑问句---if/whether 引导（在句子中不做成分，“是否”不能省）
i want to know if/whether he will come.
从句是特殊疑问句---用相应的特殊疑问词引导
who/whom/whose/what/which/when/where/why/how）
we must find out who did all these things.
2）时态。主句现在时---从句根据实际情况而定。
know he lives here.
i know he lived here ten years ago.
主句过去时---从句一定用相应的过去时。
i knew who lived here.
从句表客观事实或真理。主句无论什么时态，从句用一般现在时。
my teacher told that the earth is round.
3) 语序。
陈述句---语序不变。
eg. we will win.
we believe we will win.
一般疑问句---变陈述语序，用if/whether 引导。
will they win?
i asked if/whether they would win.
特殊疑问句---变陈述语序，用相应的特殊疑问词引导。
who is he?
do you know who he is?
补充：只能用whether 不能用if 的情况。
1. 后面有or not
eg. i wonder whether he studied hard or not.
2. 引导介词的宾语从句，只能用whether 不能用if。
the picnic will depend on whether the weather will be fine or not.
2. 宾语从句的否定转移。
think ,believe, suppose, expect, imagine 的后面的宾从否定转移懂啊主句中。即主句谓语动词用否定形式，从句谓语动词用肯定形式。
i don’t think that you are right.
3.在宾语从句中，who与whom引导的宾语从句怎样区分？？？
who，whom在从句中分别作主语和宾语，指人，其中 who可以替换whom，但是介词后面一定要用whom。
i want to know whom/who you are waiting for?
i want to know for whom you are waiting?
mrs read is the person to whom you should write．
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