英语句子中的被动语态如何确定用have/has/were/was

问题描述:

英语句子中的被动语态如何确定用have/has/were/was

have/has是完成时,后面加been再加过去分词.were/was是过去式,后面直接加过去分词.用完成时还是用过去式得看句子的时间状语或根据上下文.例句:The e-mail was sent to him yesterday.The e-mail has been sent out.T...