Party themes, replying to invitations and the Past Simple (regular verbs)

The Past Simple tells about finished actions in the past: yesterday, last week, in 2018. Regular verbs add -ed: celebrate → celebrated (only -d after e), invite → invited, want → wanted, play → played. Consonant + y: try → tried. Short verbs double the final consonant: plan → planned, stop → stopped. Irregular verbs must be learned: have – had, get – got, give – gave, go – went, eat – ate, sing – sang, make – made, buy – bought. The form is the same for all persons: I/he/we invited. Questions and negatives use did / didn’t with the base verb: “Did you invite Ali?” “I didn’t invite him.”