宾语从句使用方法总结
1. 宾语从句概说
宾语从句即指在主从复合句中用作宾语的从句。宾语从句一般由连词that和whether 与连接代词或连接副词引导。宾语从句的词序要用陈述句词序，不可以用疑问句词序：
我不了解他想要什么。
误：I don't know what does he want.
正：I don't know what he wants.
2. 宾语从句的引导词
用that引导。that只起引导词用途，不充当句子成分，也没词义，且一般可以省略：
We thinkhe will help us. 大家觉得他会帮助大家。
He saidhe was good at English. 他说他善于英语。
I knowhe is very busy. 我了解他非常忙。
用if或whether引导。if和whether引导宾语从句，不充当句子成分，但有词义，表示“是不是”：
I don't know if [whether] he will come. 我不了解他会不会来。
She asked if [whether] that was enough. 她问那是不是够了。
I wonder whether [if] it is true. 我不了解是否真的。
用连接代词引导。容易见到的引导宾语从句的连接代词有what, who, whom, which, whose等。此时要特别注意宾语从句用陈述句词序，而不需要疑问句词序：
Ask him which he wants. 问他要哪一个。
She asked who would like to go. 她问哪个想去。
Tell me whose wallet this is. 告诉我这是哪个的钱包
what引导宾语从句时，有时表示“什么”，有时表示“…所…的”。比较：
I asked what he needed. 你问他需要什么。
I gave him what he needed. 我给了他所需要的东西。
用连接副词引导。容易见到的引导宾语从句的连接副词有when, how, where, why等。此时要特别注意宾语从句用陈述句词序，而不需要疑问句词序：
He knows where they live. 他了解他们住哪儿。
Tell us how you are getting on now. 告诉大家你目前过得如何？
I can't tell you why she is crying. 我不可以对你说她为何哭。
He didn't say when he would return. 他没怎么说时候回来。
3. 宾语从句与形式宾语it
当宾语从句后跟有宾语补足语时，一般在宾语从句处用形式宾语it，而将真的的宾语从句移至句末：
I think it best that you should stay here. 我觉得你最好住这儿。
He hasn't made it known when he is going to get married. 他还没有宣布他何时结婚。
4. 宾语从句与否定转移
当动词think, believe, suppose, expect, imagine 后接一个表示否定意义的宾语从句时，其否定一般转移到主语：
I don't think that he will leave. 我觉得他不会离开。
I don't believe that it is easy. 我相信这不会容易。
