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Published January 25, 2023. Updated January 25, 2023.

Than and then are similar, because they have similar sounds and spellings, but they have very different functions in English. Than is used when making comparisons and can be either a preposition or a conjunction. Then can be used as an adverb, adjective, or noun. It usually refers to something happening at “that time” although it can also be used in other ways.

Here are some definitions and examples to help make the use of these words clearer.

Than (conjunction)

Used as a conjunction in comparisons with two clauses or phrases.

Examples:

                             He’s much smellier than he used to be.

                            I’m better at cooking than I was before taking the online course.

Than (preposition)

Used in comparisons following nouns and/or numbers.

Examples:

                             She starred in more than ten movies.

                             He is a better singer than me.

Then (adverb)

• At that time.

Examples:

                             What happened then?

                             It was important then, but not now.

• Soon after something.

Examples:

                             You’ll take a left, then take a right.

                             He ate a lot of chocolate, then had a stomachache.

• In that situation or in such a case.

Examples:

                             If you’re going to eat cookies, then you’ll want some milk.

                             If you fail the final, then you’ll have to retake the class.

Notes: These are the most common uses of then as an adverb. It has some other uses, but most are variations of “after something happens” or “at a specific time.”

Then (adjective)

Used to describe something of a specific time.

Examples:

                             The then president of Finland was a big fan of the late-night TV show host.

                             Her then partner was known for making great root beer floats.

Then (noun)

At that time.

Examples:

                             Don’t say anything about the party before then.

                             We can talk about your promotion then.

Main Points

• Than and then have the similar pronunciations, but different spellings and meanings.
• Than is used for making comparisons, and it can be a conjunction or a preposition.
• Then is used for describing specific times, certain situations, or sequences, and it can be an adverb, adjective, or noun.