him...he
her...she
句子意思：如果他/她还不知道,请告诉他/她.
前面要用宾格,后面用主格,而后面的句子里面的doesn't决定了,所填的一定要是第三人称单数.
please tell （ ） about it if （ ） doesn‘t know
3个回答
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