在she had been on the pill for three years中,为什么要用been

在she had been on the pill for three years中,为什么要用been she told us her grandfather_for three years 为什么用had been dea She said she had been to the Great Wall twice.为什么用had been 不 She has been a member of the Art Club for three years.(同义句转换 she had been at the doctor's for a long time为什么用doctor's I -------the dictionary for 2 years.have been和 have had为什么选h 1.gran had been dead for six years now.解释一下句子中“had been dead The Smiths have been here for over ten years 为什么用“been here” He has been dead for three years jack has been dead for three years he has been married for three years 句中has been married 是被动语态 he has been married for three years 句中has been married 是被语态么