Form and rules
How it works
For regular verbs, usually add -ed: work → worked, play → played.
If a verb ends in -e, add -d: live → lived. If it ends consonant + y, change y to i and add -ed: study → studied.
Some short regular verbs double the final consonant: stop → stopped.
Irregular verbs have special forms: go → went, see → saw, have → had, buy → bought.
The positive past form is the same for every subject: I worked, she worked, they worked.