英语时态问题 have been doing 能等于 keep doing 么看到一个资料上说 在某人一直做某事时可以用 have been doing 也可用keep doing 这样对么 从时间概念上讲 ,have been doing 表示是过去到现在的时间 而 kee

have+been是什么时态 英语时态区分have done .have been doing.had done.had been doing.有什么区别. have been working 是什么时态 have been to是什么时态? 英语时态问题：had painted 、having been painting、having painted分别是什么时态谢谢了 英语句子结构分析的问题,I reckon William could have been telling the truth.could have been telling 请问这是什么时态?是虚拟语气吗?如果是虚拟语气,为什么不用could have told the truth? 英语时态问题疑惑Don't worry yourself.Nothing_______.A,has been happenedB,have happenedC,took placeD,has happened到底现在哪个?尤其是CD答案有何区别 英语时态用法have +动词过去式 与have been +动名词的区别 关于时态的问题have beenhave been 和have had been有什么区别?原句是这样的：I've heard has been good.有have也有has You have been late everyday this week.中的have been late是什么时态啊?英语渣渣弱弱的问 英语：英语有哪些基本语态呢?还是叫时态来着.什么have,has been那些... 英语有关时态的问题-Late again!Where _____?-Sorry,I ____ in the heavy traffic,or I would have been here earlierA.have you been;have got stuckB.have you been;got stuck但我想知道为什么A不可以.还有就是在做英语选择题时,遇 一句话的时态问题How long have you been stay here?请问这句话是什么时态,并且说出这种时态如何使用, have/has/had加been是什么时态 have+been+现在分词构成什么时态? what have they been doing 是什么时态 to have been done是什么时态 have/has been+过去分词是什么时态?