9a. Use sentences №1, 2, 3 from №8 to make their negative forms

Решение:

Чтобы сделать предложение отрицательным в Past Simple, используем вспомогательный глагол did not (didn't) + инфинитив основного глагола (без -ed).

• 1. Ann didn't wash the dishes before Tom's coming.
• 2. Greg and Ron didn't clean their room yesterday, because their mum didn't ask them to do it.
• 3. Tim's friends didn't play basketball yesterday.

Ответ: 1. Ann didn't wash..., 2. Greg and Ron didn't clean..., because their mum didn't ask..., 3. Tim's friends didn't play...