将下列句子改为被动语态 I gave a book to Mary last week. Do we use them for posting letters?急
问题描述：
将下列句子改为被动语态 I gave a book to Mary last week. Do we use them for posting letters?
急
答
A book was given to Mary by me last week。
was it usesd for posting letters ？
答
A BOOK WAS GIVEN TO MARY LAST WEEK.
ARE THEY USED FOR POSTING?
弄清句子的宾语和动词，相应的加助动词。
答
A book was given to Mary last week .
Do they be used by us for posting letters ?
答
I gave a book to Mary last week.
A book was given to Mary last week.
Do we use them for posting letters?
Are they used for posting letters?
答
A book was given to Mary by me last week
Do them usesd for posting letters