Which sentence gives a singular subject the correct present form of do?
The delivery van do arrive before noon.
The delivery van does arrive before noon.✓Richtige Antwort
The two delivery vans does arrive before noon.
The delivery van does arrives before the lunch break.
Erklärung
The delivery van is a third-person singular subject, so the finite auxiliary must be does and the following lexical verb remains in its base form. Do mismatches that subject, and does arrives incorrectly marks both verbs for agreement.