2) Their friends were playing paintball from 5 p.m. to 7 p.m. yesterday.
Negative: Their friends weren't playing paintball from 5 p.m. to 7 p.m. yesterday.
Interrogative: Were their friends playing paintball from 5 p.m. to 7 p.m. yesterday?
Ответ: Their friends weren't playing paintball from 5 p.m. to 7 p.m. yesterday. Were their friends playing paintball from 5 p.m. to 7 p.m. yesterday?