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mikehastwolettersforhim变为一般疑问句和否定句,答案为DoesMikehavetwolettersforhim?Mikedoesn'thavetwolettersforhim.为什么要加一个does呀?

题目详情
mike has two letters for him变为一般疑问句和否定句,答案为
Does Mike have two letters for him?
Mike doesn't have two letters for him.
为什么要加一个does呀?
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答案和解析
回答你下面的追问.
如果是第一人称,就是I don't have two letters for me.
第二人称,就是You don't have two letters for you.
因为有do/does作为助动词,所以后面的动词应该用原形
letter那里如果是单数就不用加s,复数就要