be supposed to 和should have doneWAS SUPPOSED TO表示应该做某事而未做WAS NOT _英语解答

be supposed to 和should have done
WAS SUPPOSED TO表示应该做某事而未做
WAS NOT SUPPOSED TO表示不应做某事却做了
SHOULD HAVE DONE 表示因该做某事而未做
SHOULD NOT HAVE DONE表示不应做某事却做了
WAS SUPPOSED TO表示应该做某事而未做
这四个有什么关系的?比如两两相等用法?

人气：463 ℃　时间：2020-05-19 23:28:50

解答

be supposed to=shouldbe not supposed to= shouldn't完全相等就表示应该做什么前者有不同时态后者没有时态区分was supposed to 过去应该做某事事实就是没做强调过去的那个时候应该发生时间should have done ...