用do
help (to) do sth实际上有时候to是省略掉的.
help do sth
还有can't help doing sth.(忍不住/情不自禁去做某事）
help + doing 是与can't一起用的
没有help doing或help does 这种用法
Lucy helps her mother___ (does,do,doing)the housework.
Lucy helps her mother___ (does,do,doing)the housework.
此does,do,doing三个答案选哪一个?
此does,do,doing三个答案选哪一个?
英语人气：856 ℃时间：2019-10-11 11:36:07
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