宾语从句的用法说的要简洁明了,不要啰啰嗦嗦

一、宾语从句结构
1、that引导宾语从句：say,think,wish ,hope,see,believe,agree,expect,hear ,feel等动词后加that.连词that在口语中常被省略：I told him that he was wrong.
2、If、whether 引导宾语从句：一般情况下,whether和if 可以替换例：I don’t know if/whether he will come tomorrow.
注意：（1）在介词后面的宾语从句中不用if引导.例：Everything depends on whether we have enough money.
（2）宾语从句中有or not时不用if引导.例：I don’t know whether the movie star will come or not.
3、由wh-引导的宾语从句.连接代词who,whom,whose,what,which,和连接副词when,where,why,how 等连接的宾语从句,它们在句中即有连接从句的作用,又在句中充当句子的成分.例：Do you know which film they are talking about?(which做定语) I don’t know where he lives.(where 做地点状语)
二、宾语从句的语序：必须是陈述语序,既连接词+主语+谓语+其他成分
三、宾语从句的时态：受主句的限制,主句是一般现在时态,从句根据实际情况而定.主句是一般过去时态,从句用相应的过去的时态.如果从句的动作发生在主句之前,则从句要用过去完成时态.