In this lesson, we will explore the differences between “what” and “which” and how to use them correctly in English. By the end of this lesson, you will be able to confidently choose the right word for different contexts.
What vs Which
Key Differences Between “What” and “Which”
| Word | Usage | Example |
|---|---|---|
| What | Used when there is an unlimited or unknown number of options. | What do you want to eat? |
| Which | Used when there is a limited or known number of options. | Which shirt do you prefer, the blue one or the red one? |
When to Use “What”
- Unlimited Options: Use “what” when the possible answers are not limited or specified.
- Example: What is your favorite movie? (There are countless movies to choose from.)
- General Questions: Use “what” for general inquiries about preferences, opinions, or facts.
- Example: What time is it?
- What is your name?
- Categories or Types: Use “what” when asking about categories or types of things.
- Example: What kind of music do you like?
- What type of job are you looking for?
When to Use “Which”
- Limited Options: Use “which” when the options are limited or specific.
- Example: Which book should I read first? (The speaker assumes there are only a few books to choose from.)
- Specific Choices: Use “which” when presenting specific options.
- Example: Which color do you prefer, green or yellow?
- Contextual Constraints: Use “which” when the context limits the possible answers.
- Example: Which day are you free next week? (The speaker assumes the listener has a limited schedule.)
Common Mistakes to Avoid
- Using “Which” for Unlimited Options:
- Incorrect: Which is your favorite song?
- Correct:
What is your favorite song?
(There are too many songs to limit the options.)
- Using “What” for Limited Options:
- Incorrect: What dessert should I order, cake or ice cream?
- Correct:
Which dessert should I order, cake or ice cream?
(The options are clearly limited to cake or ice cream.)
Summary Table
| Question Word | When to Use | Example |
|---|---|---|
| What | Unlimited or unknown options | What is your favorite food? |
| Which | Limited or specific options | Which car do you prefer, the red one or the blue one? |
Final Tips
- Always consider the number of options when choosing between “what” and “which.”
- Use What for general questions and Which for specific choices.
- Practice by creating your own sentences and asking a friend or teacher for feedback!
Practice Games
Lesson Practice
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