have been和are being的区别是什么?
问题描述：
have been和are being的区别是什么?
have been built和are being built还有were building的区别是什么?
答
have been built是表示已经（被）建造完成的,物做主语
are being built表示正在（被）建的,物做主语
were building表示过去某个时间,正在建,人做主语.