Jane has stopped smoking _____?

Analyze the question This is a question tag question. A question tag is a short question added to the end of a statement. The tag must match the auxiliary (helping) verb in the statement, and it flips polarity: a positive statement takes a negative tag, and a negative statement takes a positive tag.

Explain the concept Rules for forming tags:

1. Find the auxiliary verb in the statement (is, has, had, will, can, and so on).
2. Repeat that auxiliary in the tag, but in the opposite polarity.
3. Use the matching pronoun (Jane becomes she).

Show the solution

• Statement: "Jane has stopped smoking."
• The verb phrase is has stopped, which is the present perfect tense. The auxiliary is has.
• The statement is positive, so the tag must be negative: hasn't.
• The subject is Jane, so the pronoun is she.
• Tag: hasn't she?

Full sentence: Jane has stopped smoking, hasn't she?

Why the other options are wrong

• B. didn't she would fit a simple past statement like "Jane stopped smoking."
• C. isn't she would fit "Jane is..." and does not match the verb here.
• D. hadn't she would fit a past perfect statement like "Jane had stopped smoking."

Answer: A. hasn't she

Exam tip: Look at the auxiliary verb in the statement and mirror it with the opposite polarity. If there is no auxiliary, use do/does/did. For example, "She stopped" becomes "didn't she?" Also, do not be misled by "stopped" and jump to "didn't." Check whether "has" comes before it.