英文have been和have seen有什么区别?该怎么区分.

have since been 和 have been since have been 和have ever been区别! I have been never see this person . have been和have gone的区别 have been away 和 has/have left have been 和have gone 的区别 have lasted 和have been on区别 英文have been和have seen有什么区别?该怎么区分. have been 和 has been的区别 has been和have been区别 Have been in和have been to的区别? have been in和 have been to区别 have been to和have been in的区别 might have been 和 cound have been的区别 have been possessing 和 have been having 哪个更合适? have been do和have been doing的不同 have been done和have been do的区别 have been doing ,have done和have doing区别