Only when students become willing to learn can they be activ

来源：学生作业帮编辑：搜搜做题作业网作业帮分类：英语作业时间：2024/08/15 10:06:27

Only when students become willing to learn can they be active in learning activities.
这里为什么不用will become啊?这是时间状语从句还是条件状语从句?
我不是问主句的倒装问题，我问的是从句里的时态问题，这里为什么不用将来时态，而用一般现在时，如果是有when引导的时间状语从句的话，不是应该主句用一般将来时，从句用一般现在时吗？这里的主句并没有用一般将来时啊

主句用将来时或者是can类的情态动词,从句用一般现在时,简称“主将从现”.
所以主句中用 they can be active,非将来时态,而从句用一般现在时.

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