The difference between these two phrases – and other similar constructions – is a question that puzzles many learners, and even some native speakers. Both expressions are used to say that you are unable to stop yourself doing something (in this case ‘laugh’), but they have different grammatical structures. Let’s explore!
I can’t help +ing form
In this structure, can’t help is followed by a gerund, which is a verb ending in -ing. This is the most common structure in everyday English:
- I can’t help laughing whenever I hear that story.
- She couldn’t help feeling a little jealous.
- He can’t help being so competitive; it’s just his nature.
This structure is well established in both British and American English and is generally considered the standard form.
I can’t help but +infintive
In this structure, can’t help but is followed by the bare infinitive, which is the base form of the verb without to:
- I can’t help but laugh whenever I see that film.
- You can’t help but admire her dedication.
- I couldn’t help but notice the mistake.
This structure is also widely used and perfectly correct, but it is considered slightly more formal and emphatic in tone.
Is there a difference in meaning? In terms of meaning, there is no significant difference between the two structures. Both convey the idea that something is impossible to avoid or resist.
