请教英语语法,Now read how she felt after being in the hiding place since July 1942.

after 是一个介词,后面加doing 在什么（时间,事件）之后的意思.being in the hiding place =she was in the hiding place但这里的she和前面的she重复了,所以省略了,又因为是主动,所以选择了非谓语的v-ing形式不是独...句子中有since，是不是应该用完成时态？不是"she had been in"而是"she was in"吗？