How do you make a word past tense?

Answer 1

For regular verbs, you should add "ed" to the end of the verb.

Irregular verbs have no formula to form the past tense and so you must simply learn the past tense form.

Answer 2

To make a word past tense, you typically add -ed to regular verbs (e.g., walk -> walked) or change the word itself for irregular verbs (e.g., go -> went). Pay attention to the specific rules and irregularities in English verb conjugation to form the past tense correctly.