1. Grammar Unit 5 Lesson 1
Parts of a Verb

2. Principal Parts of a Verb
All verbs have four principal parts.
Base Form: BE
Present Participle: BEING
Simple Past: WAS, WERE
Past Participle: BEEN
All the verb tenses are formed from these principal parts.
Principal Parts of a Verb

3. Principal Parts of a Verb
You can use the base form (except the base form of be) and the past form by themselves as main verbs.
Present and past participles must always be used with auxiliary, or helping verbs, if they are the verb phrase of the sentence.
Monkeys climb. (base form)
Monkeys climbed. (past form)
Monkeys are climbing. (present participle + helping verb)
Monkeys have climbed. (past participle + helping verb.
Principal Parts of a Verb

4. Write each sentence with the correct form of the principal part of the verb in parentheses. After the sentence, write which form was used.
John Adams (serve) as the second president of the United States.
Alison is (announce) the winner at the awards dinner.
Wayne seems to (try) harder than anyone else I know.
Sherry had been (work) hard on the set for hours.
Critics have long (consider) Walt Whitman an important American poet.
Who (move) the chair?
Nicholas (advise) me to get some sleep.
Frank will probably be (move) to Portland next year.
Exercise