Different between regular and irregular verbs in past?

The main difference between regular and irregular verbs is the different endings they have for the past tense and past participle.

REGULAR verbs always end in –ed for both past tense and past participle endings.

Here are some examples:

REGULAR VERB – Past tense – Past participle

Look – Looked – Looked

Dance – Danced – Danced

Play – Played – Played

IRREGULAR verbs end in many different ways. Unfortunately, there is no rule to help you remember them.

Here are some examples:

IRREGULAR VERB – Past tense – Past Participle

See – Saw – Seen

Drink – Drank – Drunk

Run – Ran – Run