文档介绍:宾语从句
在复合句中用作宾语的从句叫做宾语从句。在复合句中作主句谓语动词、介词的宾语.
在及物动词的后面可以接一个名词来充当宾语,如:  I know the man.
而这时也可以用一个句子来充当宾语,如:  I know that the man is a policeman。  
主句 引导词 从句
Ⅰ.宾语从句的引导词
1。陈述句充当宾语从句时,用that引导,that无词义,在口语或非正式文体中常省略。如:
My teacher said I was a good boy. She doesn't know (that) she is seriously ill. (精品文档请下载)
2。当由一般疑问句充当宾语从句时,用if或whether引导,意为“是否”。如:
(1) Is Jim a good student? I don’t know-———-—I don’t know if /whether Jim is a good student。(精品文档请下载)
(2) Does Kate get up early? Do you know? ————-—-Do you know if /whether Kate gets up early?(精品文档请下载)
注意:只能用whether不用if 的三种情况
一般情况下,if 和whether可以互换,但以下3种 情况只能用whether:
①与or not连用:He asked me whether or not I was coming。 Let me know whether you can come or not。(精品文档请下载)
②在介词之后: It depends on whether it is going to rain。 I worry about whether I hurt her feelings(精品文档请下载)
③在不定式之前: We haven’t decided whether to go there。 I don’t know whether to accept or refuse.(精品文档请下载)
,只需用原来的疑问词引导。如:
1。What is she doing? Can you tell me? —---——Can you tell me what she is doing?(精品文档请下载)
does she live? Do you know? —--—-—---Do you know where she lives?(精品文档请下载)
Ⅱ.宾语从句的语序必须是陈述语序
句式
连词
语序
例句
陈述句
That
不变
I think that we can be good friends。
一般疑问句
if/whether
改为陈述语序
I can’t remember if I posted the letter.
特殊疑问句
特殊疑问词
改为陈述语序
He asked who was our English