4、has/have been是现在完成时，has用于第三人称单数，had been过去完成时，跟前者相比，比前者更为过去。 2、when i met her, she had just returned from a job interview 4、he arrived in san francisco, having left. Official gmail help center where you can find tips and tutorials on using gmail and other answers to frequently asked questions. Has been 表示那人去了已经回来了 has gone 表示那人去了还没回来,还在哪儿 例如:tom has been to shanghai twice,now he is planning for another one.
Tom has gone to shanghai for two weeks,and he will stay there for. Have/has been done 与have/has done 的区别只在语态使用的区别，如下: 1、have been done是现在完成时的被动语态，表达的状态是一种被动的，一般主语用物。 如:his homework has been finished before he went.
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