Nouns and Verbs

1. Nouns: people, places, things, ideas
2. Verbs: the action, what is happening in the sentence

Singular and Plural (Number)

1. Singular: one
2. Plural: any other number or amount
3. 0 people vs. 1 person
4. 1.2 centemeters vs. 1 centemeter
5. 2 pizzas vs. 1 pizza

Only nouns and verbs have number in English (but BOTH of them do!)