This book is nice.(同义词转换)
This book is good.
Lin has a small mouth.（改成一般疑问句,并做回答.)
Does Lin has a small mouth?
Yes,he is.
KangKang has a book.(对"a book"提问)
Does KangKang has a book?
Lucy and Li Lei have three books.(改为否定句)
Lucy and Li Lei don't have three books.