1-What was Henry doing when you came home? He wasn't doing his homeworks.
2- Where was She waiting a taxi last morning? She wasn't waiting it in front of the bakery.
3-Were you watching T V two hours ago? No, we weren't, we were sleeping.
4-Were they studying when he phoned? Oh, no!, they weren't, they were listening to music.
5-Which of your friends was buying a watch on Dewey's while I passed? As long as I know, any friend of mine was there.
6-What were the detectives searching around the crime scene? I beg you pardon, I don't know because I wasn't there.