2. Сделайте предложения отрицательными. Не worked at the hospital last summer. They went to the library on Saturday.

1. Сделайте предложения отрицательными.

Не worked at the hospital last summer. — Не did not work at the hospital last summer. — Не didn’t work at the hospital last summer.

They went to the library on Saturday. — They did not go to the library on Saturday. — They didn’t go to the library on Saturday.

 Ann came late last night. — Ann did not come late last night. — Ann didn’t come late last night.

В отрицательных предложениях  используется вспомогательный глагол did перед глаголом. После него прибавляется отрицательная частица not. Did и not часто сокращаются до didn\'t соответственно.