英语翻译Did you find the sandwich I made for you?为什么find 不用 过去式

who did you find in the room?A.nobody B.none 为什么用A不用B Did you find the book whom i lent you? I helped him find his father.为什么find不用过去式? 英语翻译did you find the process interesting and challenging?这两句 What did you find? What did you find, did you find Did you find __________? -Where did you find the professor who made the speech yester “Where did you find the professor who made the speech yester What did you find in the corner? - How did you find the film?- _____.