Past Simple: use and form Regular verbs. Add -ed- at the end of the verb. Affirmative: Person + verb ending in -ed. The princess arrived at the castle yesterday. The dragon lived in the cave last year. Negative: Person + did not (didn't) + verb The princess did not didn't arrive at the castle yesterday. Questions Did + person + verb Did the princess arrive at the castle yesterday? Did they arrive at the castle yesterday? Answers Affirmative. Yes, + person + did. Yes, she did. Negative No, + person + did not No, they did not. Irregular verbs. They change from verb to verb. So you will have to study Affirmative Person + verb in past The zombie was my friend. The trolls went to the castle. Negative Person + did not + verb (except the verb "to be") the zombie was not wasn't, my friend. The trolls did not didn't go to the castle. Questions? Did + person + verb (except the verb "to be") Was the zombie my friend? Did the trolls go to the castle? Answers Affirmative Yes, + person + did/was/were yes, she did. Yes, they were. Negative No, + person + didn't/wasn't/weren't No, he didn't No, they weren't.