What did you do yesterday?

To talk about a finished action in the past, use the past simple. Most verbs are regular: just add "-ed" — watch → watched, visit → visited, cook → cooked, play → played. (Spelling: like → liked; study → studied.) But many of the most common verbs are IRREGULAR — each has its own past form you must memorise: go → went, eat → ate, see → saw, have → had, buy → bought, make → made, come → came, get → got, take → took. Use the past with time words like yesterday, last night, last week, and "two days ago": "I saw a film last night." To ask or say no, use "did / didn't" with the plain verb: "Did you go?" "I didn't go." Korean makes the past with one regular ending on every verb, so learners add "-ed" to irregular verbs too: "I goed home and eated dinner" ✗ → "I went home and ate dinner" ✓.

To talk about a finished action in the past, use the past simple. Most verbs are regular: just add "-ed" — watch → watched, visit → visited, cook → cooked, play → played. (Spelling: like → liked; study → studied.) But many of the most common verbs are IRREGULAR — each has its own past form you must memorise: go → went, eat → ate, see → saw, have → had, buy → bought, make → made, come → came, get → got, take → took. Use the past with time words like yesterday, last night, last week, and "two days ago": "I saw a film last night." To ask or say no, use "did / didn't" with the plain verb: "Did you go?" "I didn't go." Korean makes the past with one regular ending on every verb, so learners add "-ed" to irregular verbs too: "I goed home and eated dinner" ✗ → "I went home and ate dinner" ✓.