l have finished my homework.(变否定句)
问题描述：
l have finished my homework.(变否定句)
Her mother has bought a birthday present for her.（变一般疑问句）
Have you ever been to America.（作肯定句回答）
Has the boy thought out a good idea?（作否定回答）
She has not watched this movie.（变肯定句）
答
I haven't finished my homework.
Has her mother bought a birthday present for her?
Yes, I have.
No, he hasn't.
She has watched this movie.