⇒Khẳng định : S + was/were + ...
S + V²/-ed + ....
S + did + V + .....
Ví dụ : I was hurngry 2 hours ago .
We ate meat yesterday ./They helped their mothers their last time .
She did her homework .
⇒Phủ định : S + wasn't/weren't + ...
S + didn't + V...
Ví dụ : She wasn't at home yesterday .
He didn't play game.
⇒Nghi vấn : Was/were + S + ...
Did + S + V ....
Ví dụ : Was she happy ?
Did you play video game ?