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` 2`. I wasn't happy.

` 3`. The film was scary.

` 4`. Was he in London.

` 5`. What was for lunch?

` 6`. George wasn't very friendly.

` 7`. Were they happy?

` 8`. It was very hot.

` ---` 

` @` Quá khứ đơn

` -` V thường

` (+)` S + V-ed/V2

` (-)` S + didn't + V-inf

` (?)` Did + S + V-inf + ...?

` -` tobe

` (+)` S + was/were + ...

` (-)` S + was/were + not + ...

` (?)` Was/were + S + ...?