Since ancient times,people (send) ____________messages in many different ways.
为什么要用have sent不用have been sent...since不是用于现在完成时种么...
人气:258 ℃ 时间:2019-10-26 15:35:58
解答
have sent是主动
have been sent是被动
二者都是现在完成时态.
在这句话中people是主动send messages,并不是people被sent到什么地去了.
呵呵,这样的解释应该ok吧.
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