1.They wanted to invite Tom to their party.
(-)They didn't want to invite Tom to their party.
(?) Did they want to invite Tom to their party?
2,He went to class early yesterday.
(-)He didn't go to class early yesterday.
(?)Did he go to class early yesterday?
3,She was very busy last week.
(-)She wasn't very busy last week
(?)Was she very busy last week?
4.They were at the party last week.
(-)They weren't at the party last week.
(?)Were they at the party last week?
5,Liz visited Ha Long Bay last summer,
(-)Liz didn't visit Ha Long Bay last summer.
(?)Did Liz visit Ha Long Bay last summer?
6.Duong played table tennis with Duy yesterday.
(-)Duong didn't play table tennis with Duy yesterday.
(?)Did Duong play table tennis with Duy yesterday?
7.I read a book yesterday.
(-)I didn't read a book yesterday.
(?)Did you read a book yesterday?