一个句子中必须有几个三单现?比如说 my mother takes a bus (go/goes?) to work.
问题描述：
一个句子中必须有几个三单现?比如说 my mother takes a bus (go/goes?) to work.
答
一个句子里只能有一个三单.
My mother takes a bus 、to go to work.
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