请问这句是英文什么时态i have been beijing .been 是什么意思,它的原形是什么呢.

请问这句是英文什么时态i have been beijing .been 是什么意思,它的原形是什么呢. I have always wanted to be a teacher 请问是什么时态 I have got a cold什么时态 I have three cousins 什么时态? i have 后接什么时态 I have been to shanghai 什么时态 i will be taking.什么时态, have something done和need to be done如题 请问have to be done ,need to be done怎么使用?是什么时态?表示什么时间段? I would have been smarter,if I had studied more.I would be smarter,If I studied more.有什么区别?（时态区别） i have been told that+从句 从句用什么时态? I have ever seen和什么时态连用 I will have it 接动词的什么时态,为什么 I have already smell the flowers.这句话什么时态 句话 用什么时态正确啊/when you see this message,I have left whent you saw this message ,I have let请问,从句的时态该怎么用啊?用 see,还是saw ,那个是对的. i have never heard of that place before这句话 什么时态?为什么用这个时态？ I have done this job.这句里 have done 是完成时态,have叫什么来着?助动词? 我想问一下,I'd be glad to have you over again.是什么时态? 有首歌的歌词是all my live I've been waiting for,请问HAVE BEEN+VING是什么时态?我只学过HAVE+VING是现在进行时,have+pp是现在完成时.如果have+be原型是什么时态呢?过去一直持续到现在吗