Making subjects and verbs match in number: singular subjects take singular verbs
Singular: add -s/-es to verb. Plural: base form of verb
Singular: doesn't + base. Plural: don't + base
Singular: Does + subject + base? Plural: Do + subject + base?
💡 I/you always take plural verb form (I work, you work). He/she/it takes singular (works).
✓The list of items is on the desk.
✗The list of items are on the desk.
Subject is 'list' (singular), not 'items'.
✓Neither the teacher nor the students were ready.
✗Neither the teacher nor the students was ready.
Verb agrees with nearest subject (students = plural).
✓Everyone has arrived.
✗Everyone have arrived.
Everyone/someone/anyone is singular.