A guide to understanding this essential English expression
The phrase “can’t help doing something” is used to say that you cannot stop yourself from doing something — often because of strong emotions or habits.
In this example, the speaker doesn’t choose to laugh — it just happens naturally.
The basic structure is:
Examples:
Note: Always use the -ing form (gerund) after “can’t help.”
❌ Incorrect: “I can’t help to laugh.”
✅ Correct: “I can’t help laughing.”
Remember: never use the infinitive (“to + verb”) after “can’t help.”
Which sentence is correct?