不要加ed
help sb to do sth 不定式作宾语时to可省略 即help sb do sth
DId you help your mother clean your room yesterday?clean要不要加edDId you help your mother clean you
DId you help your mother clean your room yesterday?clean要不要加edDId you help your mother clean you
英语人气：828 ℃时间：2019-09-17 17:42:15
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