为什么用had been

She said she had been to the Great Wall twice.为什么用had been 不 用had been造句 在she had been on the pill for three years中,为什么要用been had been 和had 怎么用? had been done 怎么用? When the fire had at last been put out.为什么是had ...been. not only had the poor man been arrested.为什么主语要放到had been 的中间 she told us her grandfather_for three years 为什么用had been dea 这两题英语为什么都用had benn?been不是被动吗? That was the first time (that) I had been in Rome.为什么用过去完成时? she had been at the doctor's for a long time为什么用doctor's over the years the cave wall had been shaped by 为什么用过去完成时