i always get better grades than he does,为啥要加does

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i always get better grades than he does,为啥要加does
i always get better grades than he does,为啥要加does

i always get better grades than he does,为啥要加does
he 后面的does 是代替了 gets garades 其实就是一个隐形的比较句吧

he是第三人称要用三单does

does =gets grades 为了避免重复。用does