I will do better if the teacher (gives) me another chance

问题描述:

I will do better if the teacher (gives) me another chance
give后面为什么要加s呀?

住局势一帮将来时,从句用一般现在时.这里从句的主语是teacher,为第三人称单数,所以动词要加s,是现在第三人称单数形式.
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