1. Look! Nick is reading a book.
Look! Nick isn`t reading a book. Look! Is Nick reading a book?
2. Yesterday Ann went for a walk with Mary.
Yesterday Ann didn`t go for a walk with Mary. Did Ann go for a walk with Mary yesterday?
3. Your mother cooks dinner every day?
Your mother doesn`t cook dinner every day. Does your mother cook dinner every day?
4. I think tomorrow he will not come.
I think tomorrow he will come. Will he come tomorrow?