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1、一、条件状语从句的主句是一般将来时,那么从句常常用一般现在时如: When I grow up, I’ll be a nurse and look after patients我长大后要当一名护士,照顾病人二、如果主句是祈使句,那么从句通常要用一般现在时如:Don’t laugh at me when I make a mistake. 我犯错误的时候不要笑话我。

2、三、如果主句是含有情态动词的一般现在时,根据需要从句多用一般现在时如:You should be quiet when you are in the reading room在阅览室时应保持安静四. 如果if的条件状语从句遇到变换间接和直接时 , 祈使句应用not to....如; She said not to close the window常见的时间状语从句的连词有:as soon as,when,while ,as,until等主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中,如果主句的时态是一般将来时,那么从句要用一般现在时。

3、例如:I will tell him about it when he comes.If it is fine tomorrow, we will go outing.如果主句的时态是过去将来时,那么从句要用一般过去时。

4、例如:He said that he would have another try if he had the chance.I knew he could help me if he was free the next day.。

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