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.