ESL Grammar Activity - The Past Tense
efl-esl.com › esl-grammar-activity-tenseJun 15, 2018 · Past Tense 2 For regular verbs, forming the past tense is simply a matter of adding “ed” to the root form of the verb. (The root form of the verb is the infinitive without the “to”.) Example: Infinitive: to walk Root form: walk Past tense: walked. Unfortunately, there are many verbs that are irregular in the