Let's complete the grammar rules with the provided words:
- Egg, tomato and burger are examples of countable (a) nouns. There is a singular and plural form: one egg, two eggs, etc.
- Some things like bread, milk and butter do not usually have a plural form because we cannot count (c) them. Many words are both countable and uncountable.
- If we talk about something in general, like coffee, the word is uncountable (d).