had been in的用法和樣例：
例句
- After he had been in prison Peter was regarded as the black sheep of the family.
彼得坐過牢之後，被看作是家庭中的不肖子孫。 - He disclosed that he had been in prison.
他透露說自己曾坐過牢。 - He saw at once that somebody had been in his study, because some of his books were out of place.
他一眼就看出有人進過他的書房，因為他的書有的給搞亂了。 - If our documents had been in order we could have left at once.
要是我們的證明文件都很妥當的話，我們就能夠馬上走。
