I don’t know whether he’ll come tonight or not
Did you know whom they are waiting for
I wonder if the teacher will come to our house
I’m not sure how often Mr Black goes to see his parents
Do you know who he thinks will buy new books for us
Our teacher told us that the earth goes around the sun
在复合句中用作宾语的从句叫宾语从句
宾语从句:宾语从句引导词时态语序1 、 That2 、 Whether/ if3 、疑问词1 、主句为现在时,从句的时态可以为任何时态
2 、主句为过去时,从句的时态为过去时的一种
3 、从句为客观真理,自然现象,永恒不变的规律,只用一般现在时
宾语从句的语序为陈述句语序
当由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通常省略
当由一般疑问句充当宾语从句时,用 if 或 whether 引导,意为“是 否“
如果宾语从句原来是特殊疑问句,只需用原来的特殊疑问词引导
Do you remember
引导词为疑问词时 , 有时可以转换为“疑问词 + 不定式”的简单句
从句中有 or not 时只用 whether
前面有介词时只用 whether
Examples:1
I don’t know whether he will come to the party or not
He always thinks of whether he can do more for t