He has stopped being foolish … ?

Analyze the question

This is a question tag question. The sentence is "He has stopped being foolish ...?" We need the tag that correctly completes it.

Explain the concept

A question tag is formed from the main clause:

• Use the same auxiliary verb as the main clause.
• If the statement is positive, the tag is negative. If the statement is negative, the tag is positive.
• The pronoun in the tag matches the subject.

Show the solution

1. Main clause: "He has stopped..." The auxiliary verb is has (present perfect: has + stopped).
2. The statement is positive, so the tag must be negative: hasn't.
3. The subject is "He", so the pronoun is he.
4. Tag: hasn't he?

Checking the other options:

• A. "doesn't he" uses the wrong auxiliary. The sentence is not in the simple present.
• B. "does he" is both the wrong auxiliary and a positive tag after a positive statement.
• D. "isn't it" has the wrong pronoun and the wrong auxiliary.

Full sentence: "He has stopped being foolish, hasn't he?"

Answer: C

Exam tip: Find the auxiliary verb in the statement (is, has, will, can, etc.), flip positive to negative (or negative to positive), and repeat the subject as a pronoun. If there is no auxiliary, use do/does/did.