4. Образуйте отрицание. 1. He cleaned the room yesterday. 2. She washed her bike yesterday.

Решение:

Чтобы образовать отрицание в Past Simple, используем 'did not' (didn't) и ставим основной глагол в начальную форму.

1. He didn't clean the room yesterday.
2. She didn't wash her bike yesterday.

Ответ: He didn't clean the room yesterday. She didn't wash her bike yesterday.