haven t seen是什么时态

　　He left the village in1982 and I haven t seen him since then.

　　1982年他离开这个村子，从那以后我再没见过他。

　　How can I believe what I haven, t seen in a situation like this?

　　这种事情我不亲眼看见怎么能信？

　　You haven, t seen anything, okay?

　　你们什么都没看见，记住了吗？

　　Maybe you haven, t seen the exercise equipment in front of large building complexes where people exercise all day.

　　估计你没有看到那些大型综合楼前面的锻炼设施，人们整天都在那里锻炼。

　　If I haven · t seen the darkness, I can · t seen the bright forever.

　　如果我不能看见黑暗的存在，那么光明于我来说也就不复存在。