第1个回答 推荐于2016-12-02
宾语从句即代替宾语的句子.
宾语从句在复合句中作主句的宾语。
为陈述句时，该从句由that引导，that在口语中可省略。
e.g. I think that someone forget to sweep the floor.
He is sure that he can pass the exam.
为一般疑问句时，由if/whether引导，采用陈述句语序。
e.g. I don’t know if/whether he will come.
He asked me if/whether I worked watch the game.
为特殊疑问时，由特殊疑问词引导，用陈述句语序。
e.g. I don’t know when the plane takes off.
He asked where she put the books.
宾语从句的时态：
主句是一般现在时，从句根据需要使用各种时态;
主句是一般过去时，从句只能用相应的时态。
e.g. I think that he is right.
宾语从句的时态：
e.g. Do you know how he came here?
Did he tell you if he had lost the book?
如果宾语从句所陈述的是客观真理，自然现象或公式，定理，谚语，名人名言等，则用一般现在时。
e.g. My grandfather told me that the earth goes around the sun.
He told us that Sunday is the first day of a week.本回答被提问者采纳