He doesn't know French perfectly. Does he know French perfectly? I don't understand everything he says.
Do you understand everything he says? She doesn't make mistakes in spelling. Does she make mistakes in spelling? They don't enjoy their English lessons. Do they enjoy their English lessons? They don't live in Kiev. Do they live in Kiev? We don't use our books in class. Do we use our books in class? The plane doesn't leave at ten o'clock. Does a plane leave at ten o'clock? She doesn't always come to class late. Does she always come to class late?
