高一英语Since you ( )around our school,we hope you*ll give us some advice on how to improve our wora:have shownb:have been shownc:have been showingd:showedsince后面不是加过去时或过去时态的句子吗?这里怎么…………
问题描述：
高一英语Since you ( )around our school,we hope you*ll give us some advice on how to improve our wor
a:have shown
b:have been shown
c:have been showing
d:showed
since后面不是加过去时或过去时态的句子吗?这里怎么…………
答
当主句是现在完成时态时,since后面接过去时.这道题的主句是一般将来时,主句的动作发生在从句动作之前,所以用现在完成时态.主句主语是we,所以从句主语you用被动语态.