Form and rules
How it works
Regular verbs usually take -ed; irregular verbs have special past forms such as went, saw and had.
Use did not/didn't + base verb for negatives: We didn't go.
Use Did + subject + base verb for questions: Did you see him?
After did or didn't, use the base form, not the past form.
Finished-time expressions include yesterday, last night, in 2019 and three hours ago.