Fill in the blank with the appropriate question tag:
The nurses have checked the patient’s blood pressure, ________?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → haven’t they
Question tag after the present perfect:
“Have checked” is have + past participle (V3). The helping verb is “have”, so the tag repeats it. The sentence is positive, so the tag is negative: “haven’t”. “The nurses” becomes “they”.
Complete sentence: The nurses have checked the patient’s blood pressure, haven’t they?
Why the Other Options are Incorrect?
Option 1: didn’t they — Incorrect. “Didn’t” goes with a simple past sentence that has no helping verb. Example: The boys finished the work early, didn’t they?
Option 3: don’t they — Incorrect. “Don’t” goes with a simple present sentence that has no helping verb. Example: The guards start duty at eight, don’t they?
Option 4: have they — Incorrect. This is a positive tag. It goes with a negative sentence. Example: The workers haven’t been paid yet, have they?