We use the past tense to talk about something that happened in the past:
I met my best friend in 2009.
When I was a boy, I walked a mile to school every day.
Sometimes we often use “ago” with the past tense:
I met my wife a long time ago.
There are two types of verbs: regular and irregular. The past simple form of regular verbs is made by adding -ed to the infinitive. For example:
play – played: He played the piano.
work – worked: They worked in the supermarket.
walk – walked: I walked for an hour.
We make negative sentences and questions with the auxiliary “did”:
Did + not + infinitive verb
He did not play the piano when he was five. (Long form)
He didn't play the piano when he was five. (Short form)
Did + subject + infinitive verb
Did he play the piano when he was five?
Notice that when the verb “to be” is the main verb of the subject, the auxiliary “did” is not needed in neither the negative nor the question:
He was in the living room.
He wasn't in the living room.
Was he in the living room?