Помогите пожалуйста!!!Очень нужно!!!! Нужно поставить предложения в отрицательную и вопросительную форму.
1) I've met him before.
2) They've learned yhe new rule.
3) He's finished his work.
4) The boy has woken up.
5) She's made this mistake before.
6) They've had a long walk today.