What are the two types of verb in past form?

There are not exactly "two types" of verbs in the past form, but rather two ways to form the past tense:

1. Regular verbs: These verbs add -ed to the base form to create the past tense.

* Example: walk (base form) -> walked (past tense)

2. Irregular verbs: These verbs have irregular past tense forms that don't follow the standard "-ed" rule.

* Example: go (base form) -> went (past tense)

It's important to note that irregular verbs have their own unique forms that need to be memorized. There are many resources available to help learn these forms.