Write the correct form of the verb to be! 1. He
a doctor.
2 I
not tall.
Paul twenty-three years old?​

Here's the correct form of the verb "to be" for each sentence with a brief explanation:

1. He ___ a doctor.

   • Correct form: He is a doctor.
   • Explanation: The subject "he" requires the singular present form of "to be," which is "is."

2. I ___ not tall.

   • Correct form: I am not tall.
   • Explanation: For the subject "I," the correct present form of "to be" is "am."

3. Paul ___ twenty-three years old?

   • Correct form: Is Paul twenty-three years old?
   • Explanation: In questions, the verb "to be" comes before the subject. Since "Paul" is singular, we use "is."

Final Correct Sentences:

1. He is a doctor.
2. I am not tall.
3. Is Paul twenty-three years old?

If you're learning this, practice replacing the blanks with the correct forms of "to be" (am, is, are) depending on the subject and sentence structure!