1. Name the four principal parts of a verb.
Answer: base form, present participle, past, past participle
2. Which two of the principal parts of a verb require helping verbs?
Answer: present participle and past participle
3. Identify each of the following forms of attack as each of the four principal parts of the verb.
a. attack b. (have) attacked c. attacked d. (is) attacking
Answer: a. base form; b. past participle; c. past; d. present participle.
4. Which of the four principal parts of the verb is used in this sentence?
The baby is crying.
Answer: present participle
5. Which of the four principal parts of the verb is used in this sentence?
The killer whale attacked the seal.
Answer: past
