Who helped you clean the classroom?Daming( ).( )中是did还是was?rt,为什么

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Whohelpedyoucleantheclassroom?Daming().()中是did还是was?rt,为什么Whohelpedyoucleantheclassroom?Daming().()中

Who helped you clean the classroom?Daming( ).( )中是did还是was?rt,为什么
Who helped you clean the classroom?Daming( ).( )中是did还是was?
rt,为什么

Who helped you clean the classroom?Daming( ).( )中是did还是was?rt,为什么
你好:
Who helped you clean the classroom? Daming( did ).
因为前面已经有了行为动词 help 后面有主语 Da ming 谓语动词需要助动词
即 Da ming helped me clean the classroom