if you ____ free tomorrow you can go shopping with us.A are B will be C will D are going to be为什么句中用are?而不用will be ,will,are going to be?

问题描述:

if you ____ free tomorrow you can go shopping with us.A are B will be C will D are going to be
为什么句中用are?而不用will be ,will,are going to be?

因为if后不加will或者be going to

if领导的条件状语从句主句用将来时,从句(if后面的)用一般现在时

亲,if 从句中一般将来时用一般现在时代替 

亲,if 从句中一般将来时用一般现在时代替 
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