To talk about a whole class of things in general we normally use a plural or uncountable noun with no article (Dogs are loyal). Another way, mostly in science and formal writing, is the + singular noun to represent the whole type (The dog is a loyal animal).
Form
| Structure | Example |
|---|---|
| plural / uncountable noun, no article | Dogs are loyal. Music is fun. |
| the + singular countable noun (type) | The dog is a loyal animal. |
| a/an + singular (any example) | A dog needs exercise. |
When to use it
- General statements: Cats like fish. Honesty is important.
- A type as a whole (formal): The blue whale is the largest animal.
- Inventions and instruments: The telephone changed communication. She plays the violin.
- Adjectives for groups: the young, the elderly, the French.
Examples
- Computers have changed our lives.
- The computer has changed our lives.
- Children need love.
- The tiger is an endangered animal.
- Water is essential for life.
- The rich should help the poor.
Common mistakes
- “The” before a general plural: The people are kind (in general) → People are kind.
- “The” before uncountable abstract nouns: The life is short → Life is short.
- “A” for the whole class: A tiger is… works for any example, but Tigers are… is more natural.