have been doing sth 和 have +过去分词 有什么不一样?看见since 之类的词 是应该用哪种形式?如题

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have been doing sth 和 have +过去分词 有什么不一样?看见since 之类的词 是应该用哪种形式?如题
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have been doing sth 和 have +过去分词 有什么不一样?看见since 之类的词 是应该用哪种形式?如题
have been doing sth 和 have +过去分词 有什么不一样?看见since 之类的词 是应该用哪种形式?
如题

have been doing sth 和 have +过去分词 有什么不一样?看见since 之类的词 是应该用哪种形式?如题
have been doing sth 表示到现在为止一直在做某事情,而且有继续做下去的可能!
have +过去分词 表示的是已经完成了什么事情!
见since 之类的词,大多数用have been doing sth ,因为是从某时刻开始,基本上到现在还在延续~
不知道我的回答清楚么?
*_*

have been doing sth.是现在完成进行时,have done 是现在完成 看见since通常用have done

have been doing 表示一直持续作某件事。have done表示现在完成时。看见since 之类的词，用have done就是have +过去分词。

have been doing sth have been doing sth是什么时态? Have/has been 后一定要加doing sth.吗? have(has) been doing sth 造句写翻译 have fun doing sth have fun doing sth. have trouble doing sth have trouble doing sth have sth doing用法? have been doing sth=have 直接加动词过去分词吗? 英语中have been doing sth和have done 的区别?同上 have been doing sth和现在完成时有区别吗?我上课记得老师说现在完成时后面加什么就等于have been doing sth这个延续的句型. have difficulty in doing sth .have trouble in doing sth 是have difficulty doing sth还是have difficult doing sth? have difficulty doing sth可以写成 have difficulties doing sth have been （ing） doing sth.意思?有（ing）吗? have somebody do sth 还是doing sth? have fun( in) doing sth