Put the verb in brackets into the positive form of the past simple. For example, (look) She ____ at me and smiled. → She looked at me and smiled.
(do) Tommy the homework himself.
Add -ed to the infinitive.
# watch → watched, explain → explained, paint → painted
No -ed, you must remember the past simple form of each verb.
# tell → told, have → had, make → made
Basic irregular verbs: