Кто разбирается в вопросах,ХЕЛП.
Поставьте предложения в вопросительную и отрицательную форму.
1.I've met him before.
2.They ve learned the new rule.
3.He's finished his work.
4.The boy has woken up.
5.She's made this misrake before.
6.They've had a long walk today.