i have been a teacher for twenty years（保持原句意思） i ___ ___ ___ a teacher for twenty years.

I have been a person . i have been here many a I have been looking for a man. I have always been a person I have always been a maverick是什么意思 She （proposes） that we have a birthday party for our English teache I have been being a worker还是I have been a worker 句子改错：I (A.have been) (B.learning) English (C.since) I (D.have been) ten. i have been a perfect ass 如果是 have i been a perfect ass 这个 i 和 have I have been selling I have been trying I have ever been I too have been I have been to. I have been I have been in. Never in my life ___ in that manner.A.have I been spoken to B.have I been spoken C.Ihave been spokenD.I have been spoken to i have been here ( )a year.A,since B,for