i am having trouble finding out who has taken my book.为什么用finding out

如题所述

have trouble in doing sth 做某事时遇到麻烦,后用动名词
所以用finding,in可省略
温馨提示:答案为网友推荐,仅供参考
第1个回答  2011-04-22
have trouble doing sth.
做某事有困难
相似回答