If引导的条件状语从句
if引导的条件句有两种:真实条件句和非真实条件句。真实条件句是叙述真实可能发生的事情，非真实条件句：虚拟语气的一种，表示与实际已发生事实相反。
if引导的条件句
1.如果从句表示将来要发生的事情，从句通常用一般现在时，主句用_一般将来时态，即“主将从现”原则。
2.如果主句中含有will、may、can、might等情态动词时，从句通常用一般现在时。
3.如果主句是祈使句，从句通常用一般现在时。
4.如果表示的是客观事实或普遍真理，从句和主句通常都用一般现在时。
if引导的条件句结构
1、If+主+谓+其它，主+will+动词原形+其它，例句如下：
If it rains tomorrows,i will stay at home.
2、If+主+谓+其它，祈使句（注意：此时主句是个祈使句），例句如下：
If you go to work tomorrow, don’t be late.
3、If+主+谓+其它，主+情态动词+动词原形+其它，例句如下：
If you come here tomorrow, he can help you.
我们在if主将从现的考题中，一般出现上面的3种情况，大家掌握了吗？不懂的可以在下面留言。
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