两条横线表示一条吧!
1.The girl can speak English.(改为一般疑问句）
Can the girl speak Enlish?
2.Tom doesn`t often study in the library.(改为否定句）
3.My parents clean the house on Sundays.（改为一般疑问句并作否定回答）
Do your parents clean the house on Sundays?
NO,they don`t.
4.there are some old boxes on the desk.（改为单数）
there is an old box on the desk