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
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