What is the past form of a verb?

- The past form of a verb is 'the way it is written and used in the past tense'.

- For regular verbs, the base form is changed to the past form by adding '-d, -ed or -ied'. For example:

bake(base form)-baked(past form)

smile  -smiled

smell  -smelled

fry  -fried

- For irregular verbs, the past form can remain the same as base form, or be completely different. For example:

beat-beat

cost-cost

buy-bought

go-went