Поставьте предложения в отрицательную и вопросительную форму и задайте вопрос к выделенному слову

1 we didn't drink coffee yesterday ; did we drink coffee yesterday?

2 she wasn't in London two years ago; was she in London two years ago?

3 my sister didn't help mum ; did my sister help mum?

4 they couldn't play chess at the age of five; could they play chess at the age of 5?