if的条件状语从句的三种用法

发布时间:2022-10-19分类:初一辅导

1、主将从现(主句为一般将来时,从句为一般现在时);2、主句含有情态动词(must、may、can etc.)从句为一般现在时;3、主句为祈使句,从句要用一般现在时态。

if从句的三种用法

1、主将从现(主句为一般将来时,从句为一般现在时);

eg:If it rains(从句) ,I will stay at home(主句).

=I will stay at home if it rains.

2、主句含有情态动词 (must、may、can etc.)从句为一般现在时;

eg:If you drive too fast ,you may have an accident.

=You may have an accident if you drive too fast

3、主句为祈使句,从句要用一般现在时态;

eg:Don't play computer games if you don't finish your homework.

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