The film editor sits in a dark room with two monitors. On the left, a timeline of clips: a chase, a conversation, a door opening. On the right, a script covered in notes. She points at the timeline and says, “This scene is longer than that one.” Then she points at the script and says, “Then the door opens.” Two sentences, two words, one sound. The first word compares. The second word sequences. Swap them and both sentences break — the comparison becomes a timetable, and the timetable becomes a comparison. The cutting room is where the two words earn their living, and it is the best place to learn them apart.
Than is the word of comparison: bigger than, faster than, rather than, more than. Then is the word of sequence and consequence: first this, then that; if this, then that. They sound identical in unstressed speech, they differ by a single vowel, and they do completely different jobs. The editor who confuses them cuts the wrong scene. The writer who confuses them tells the wrong story.
The Cutting Room: Two Words on the Timeline
Think of a sentence as a strip of film. Than is the editor’s comparison tool: it holds two clips side by side and measures them against each other. “The chase is longer than the conversation.” “Her delivery is sharper than his.” “This take is better than the last one.” In each sentence, than sits between two things being weighed, and the sentence’s job is to say which one wins.
Then is the editor’s sequencing tool: it lays the clips end to end and says what comes next. “The chase ends. Then the conversation begins.” “She opens the door. Then she sees the room.” In each sentence, then sits at the seam between two moments, and the sentence’s job is to say what follows what.
The two tools look alike on the shelf, but they cut differently. Comparison puts things side by side. Sequence puts them in a line. If your sentence is weighing two things, reach for than. If it is ordering two moments, reach for then.
Than: The Comparison Word
Than appears wherever English compares. It follows comparative adjectives and adverbs: bigger than, smaller than, faster than, more carefully than, less often than. “The new cut is tighter than the old one.” “She speaks more quietly than her brother.” It follows more and less: “more than enough,” “less than an hour.” It follows rather and other: “rather than argue,” “other than that.” And it follows prefer and would rather: “I prefer tea than coffee” is a common error — the standard form is “I prefer tea to coffee” — but “I would rather have tea than coffee” is correct, because rather than is the comparison.
Than also introduces the second half of a comparison in which something is missing. “He is taller than I am” is the full form; “He is taller than me” is the everyday form, and both are widely accepted in modern English. The grammar of the second half has been debated for centuries — grammarians once insisted on “than I,” and everyday speakers have always said “than me” — but the word itself never changes. Whatever follows it, the comparison word is than.
There is one more job than does that surprises people: it can mark an exception. “Other than the ending, I loved the film.” “No one other than the editor saw the rough cut.” Here than means “except” — and the meaning is still comparative at heart: everything measured against the exception.
Then: The Sequence Word
Then is the word that moves time forward. Its most common job is sequence: “First we shot the scene, then we edited it.” “She read the script, then she made notes.” “The door opens, then the music starts.” In each sentence, then is a signpost on the timeline: this happened, and after it, that happened.
Its second job is consequence: “If the scene runs long, then we cut it.” “If the audience is confused, then the edit has failed.” Here then is not about time at all. It is about logic: if this is true, then that follows. The “if… then” pair is one of the most common structures in English, and it appears in everything from math proofs to everyday arguments.
Its third job is the aside: “The edit is finished. Then again, the director might disagree.” “Then again” is a fixed phrase meaning “on the other hand” — a pivot, a second thought. And its fourth job is the backward glance: “Back then, films were cut on flatbeds.” “Now and then, a scene still surprises me.” “Then” can point to the past as easily as it points to the next moment. The word is a general-purpose time marker, and it does all of these jobs without changing its spelling.
The Sound Trap: Why the Ear Merges Them
The reason the two words get confused is simple: in unstressed speech, they sound the same. “Bigger than that” and “bigger then that” come out of the mouth as near-identical strings of sound, because the vowel in both words reduces to a neutral schwa when it is not stressed. The ear cannot tell them apart. Only the meaning can.
The spelling difference is a single vowel — A in than, E in then — and it carries the whole distinction. That is why the confusion is so persistent. The words are designed, by history, to be confused: both come from the same Old English root, þanne, which served as both a comparison word and a sequence word before the two jobs split into two spellings. The split is the language’s way of telling you which job the word is doing. The ear hears one sound. The spelling sees two jobs.
The fix is not phonetic. It is semantic. You cannot hear the difference, so you have to think it. When the word appears in your draft, ask: am I comparing, or am I sequencing? Comparison takes than. Sequence takes then.
Then’s Other Jobs: Consequence and Aside
Because then does more than sequence, it is worth meeting its other jobs in full. The consequence job appears in conditionals: “If you cut this scene, then the ending won’t make sense.” The “then” is sometimes dropped — “If you cut this scene, the ending won’t make sense” — but it is always understood, and adding it back never hurts.
The aside job appears in “then again” and “but then”: “The film is long. But then, so is the novel.” Here then introduces a qualification, a softening, a second thought. The word is doing conversational work, not timeline work.
And the backward-glance job appears in phrases like “back then,” “until then,” “by then,” “since then,” and “from then on.” Each of these anchors a sentence to a moment in the past or future. “By then, the edit was finished.” “From then on, she cut her own films.” The word is a time anchor, and the preposition tells you which direction the anchor points.
Than in Idioms and Comparisons
Than anchors its own set of idioms. “Better late than never.” “Easier said than done.” “More than meets the eye.” “Blood is thicker than water.” “Actions speak louder than words.” In each phrase, than is doing comparison work — weighing two things, two actions, two truths. The idioms are fixed, and the word in them is always than, never then.
There is one famous trap: “different than” versus “different from.” The standard form is “different from” — “This cut is different from the last one.” “Different than” is common in American speech and increasingly accepted in informal writing, but in formal writing, “different from” is still the safer choice. Either way, the word is than or from, never then.
Than and Then in Headlines
Headlines are where the two words cause the most public damage, because headlines are read fast and remembered long. “Bigger Than Expected” means the thing exceeded expectations. “Bigger Then Expected” means nothing at all — it is a timetable with no events. News editors know this, and they proofread headlines twice, because a swapped word in a headline is seen by thousands of people before anyone can fix it.
The error appears in social media even more often than in print. A caption that says “I like this one better then that one” is comparing two things with a sequencing word, and every reader who notices winces a little. The fix is the same as always: compare with than, sequence with then. The headline is the sentence’s shop window. The spelling in it should be the best spelling you have.
The Timeline Test
When the word appears in your draft, run the timeline test. Cover the word and ask: does this sentence compare two things, or does it order two moments? If it compares — if you could insert the words “compared to” — the word is than. “This scene is longer [compared to] that one” works, so it is than. If it orders — if you could insert the words “after that” or “next” — the word is then. “The chase ends. [Next], the conversation begins” works, so it is then.
And if you ever forget which is which, remember the cutting room. The editor compares with than and sequences with then. Side by side is than. End to end is then. Two words, one sound, two jobs — and the timeline knows which one you mean.
