Infinitive of Purpose
What Is It?
Infinitive of Purpose refers to to + base verb used to explain why someone does something.
B1-B2 reference topic in Verb-Related Topics.
Why Use It?
- Answer why in a compact way.
- Avoid because when the result is a planned purpose.
- Write clear instructions and goals.
Formation and Patterns
| Use | Pattern | Example |
|---|---|---|
| Simple purpose | main clause + to + V | I joined the class to improve fluency. |
| Negative purpose | in order not to + V | She wrote notes in order not to forget. |
| Formal purpose | in order to / so as to + V | We met early in order to practise. |
Common Mistakes
- Using for + verb: say "to learn," not "for learn."
- Confusing purpose with result.
- Using so as not to in casual writing when not needed.
Exceptions & Nuances
- For + noun is correct: I joined the class for extra practice.