Ответ:упражнение 1: sleep-slept,
Open-opened, iron-ironed, clean-cleaned, take - taken, arrive-arrived, put-put, leave-left, break - broken, make-made, run-run.
Упражнение 2:
Long Form: We have not worked hard. I have visited them several times. She hasn't finished yet. They have talked to him.
Short form: We haven't worked hard. I've visited them several times. She hasn't finished yet. They've talked to him.
Объяснение: Написано все правильно мы это уже проходили!