英文have been和have seen有什么区别?该怎么区分.

英文have been和have seen有什么区别?该怎么区分. have/has been to 和 have/has gone to 的区别.该怎么区分啊. could have been 和may have been 有什么区别? have been to 和 have been in 和have been on有什么区别 请问一下have been to和have been in和have been at有什么区别? have just seen 和have already seen有什么区别呢 have just seen 和have already seen有什么区别呢拜托各位了 3Q Have Joan ever been seen Mary?翻译下`把ever去掉和不去掉有什么么区别 have been 和 have arrived用法上有什么区别 have gone和have been going 有什么区别啊? have been to 和have gone to 有什么区别 请问have collected 和have been collecting 有什么区别