1. I have to pay a library fine; I must have (forgot) to return a book on time.
2. Unfortunately, she had already (throw) the map away.
3. My uncle Jack has(drive) a taxicab for over thirty year.
4. Noah had already (write) a letter to his grandfather.
Write correct form of verb in ().
1.forgotten
2thrown
3.drove
4.written
1, 2, and 4 are correct.
For 3, use the past participle of "drive."
To form the correct verb tense, we need to identify the base form of the verb and apply the appropriate past participle ending. Here's how you can get the correct form for each sentence:
1. "I have to pay a library fine; I must have (forgot) to return a book on time."
The base form of the verb "forget" is "forget." To convert it into the past participle form, add "ten" at the end, resulting in "forgotten." Therefore, the correct form of the verb in this sentence is "forgotten."
2. "Unfortunately, she had already (throw) the map away."
The base form of the verb "throw" is "throw." To form the past participle, add "n" at the end, resulting in "thrown." Therefore, the correct form of the verb in this sentence is "thrown."
3. "My uncle Jack has (drive) a taxicab for over thirty years."
The base form of the verb "drive" is "drive." To form the past participle, add "en" at the end, resulting in "driven." Therefore, the correct form of the verb in this sentence is "driven."
4. "Noah had already (write) a letter to his grandfather."
The base form of the verb "write" is "write." To form the past participle, replace the "e" at the end with "t," resulting in "written." Therefore, the correct form of the verb in this sentence is "written."