How do you work out the past tense of a word?

The past tense of regular verbs ends in -ed for example:
talk - talked, walk - walked, listen - listened

The past tense of irregular verbs do not end in -ed but can be the same word or a different word for example:

run - ran, eat - ate, cut - cut, buy - bought,

You have to learn irregular verbs past form. To see a list of irregular verbs click on 'related links' below.