an then (and then)

Writers sometimes type or say 'an then' instead of the correct connector 'and then.' That missing 'd' interrupts the link between actions and makes text look careless. Below are clear rules, punctuation notes, typo checks, and plenty of ready-to-use rewrites.

Quick answer

'An then' is incorrect. Use 'and then' to join actions in sequence, or use 'then' alone for a tighter, more formal sentence.

'And' is a coordinating conjunction; 'then' is an adverb indicating time or sequence.
If you spot 'an then,' either fix the typo to 'and then' or drop 'and' and use 'then' if the sentence reads better.
For formal writing prefer 'then' or alternatives like 'subsequently' when clarity and concision matter.

How 'and then' works

'And then' pairs a conjunction and an adverb to connect two actions in order: the conjunction links the clauses; the adverb places them in time. Use a comma before 'and then' when it joins two full independent clauses.

Correct pattern: [clause], and then [clause]. - "She ate breakfast, and then she left."
Lean alternative: [clause]. Then [clause]. - "She ate breakfast. Then she left."
'An' is an article, not a conjunction; 'an then' is therefore a mismatch and almost always a slip or typo.

Common grammar detail: conjunctions, adverbs, and punctuation

When two independent clauses are joined by 'and then,' place a comma before it in most formal contexts. In short, tight sentences or informal writing the comma can be optional, but clarity should guide you.

Long clauses: use a comma before 'and then.'
Short, closely connected actions: consider separate sentences starting with 'Then' for emphasis and clarity.
Avoid hyphenating 'and then'; it is not a compound adjective in normal writing.

Spacing and typos you'll see in real writing

Most occurrences of 'an then' come from typing slips, misheard speech, or run-together words. Check for a missing 'd,' fused words like 'andthen,' or extra spaces.

Look for: 'an then', 'andthen', 'anthen'. Each usually needs correction.
Use find-and-replace to fix repeated mistakes, then read each change in context to decide if 'then' alone works better.
Voice-to-text often drops consonants; proofread transcripts with this pattern in mind.

Hyphenation and compounding: should you ever write 'and-then'?

Do not hyphenate 'and then' in standard writing. Hyphens create word compounds; 'and then' performs a syntactic role. Only in deliberate, creative stylization might you see 'and-then,' and even then it remains nonstandard.

Avoid 'and-then' in academic, technical, or business documents.
If you need a compact adjective to describe sequence, rephrase: 'the subsequent step' or 'the next step'.

Real usage and tone: where 'and then' is natural and where 'then' is better

'And then' fits spoken English, narrative, and conversational writing because it mimics natural cadence. In reports, essays, or formal emails, prefer 'then' or a stronger transition word for brevity and precision.

Use 'and then' for storytelling, dialogue, or casual messages.
Use 'then' or 'subsequently' for formal documents and clear sequencing.
Vary sentence structure instead of repeating 'and then' throughout a paragraph.

Casual: 'I picked up my bag, and then I noticed the ticket was gone.'
Work (formal): 'We audited the entries. Then we adjusted the totals.'
School (concise): 'First I reviewed the literature, then I wrote the introduction.'

Try your own sentence

Judge the phrase in context: read the sentence aloud and decide if you want a conversational link ('and then') or a tighter transition ('then'). The widget below can flag instances automatically.

Examples: wrong/right pairs you can copy

Common mistakes on the left; corrected, ready-to-use versions on the right. These span general, work, school, and casual settings.

Wrong: I went to the store, an then I went to the gym.
Right: I went to the store, and then I went to the gym.
Wrong: She finished her homework; an then she watched TV.
Right: She finished her homework; and then she watched TV.
Wrong: We signed the contract an then started onboarding.
Right: We signed the contract, and then started onboarding.
Wrong: Open the file, an then make your edits.
Right: Open the file, and then make your edits.
Wrong: He said he'd call an then he didn't.
Right: He said he'd call, and then he didn't.
Wrong: First mix the batter an then fold in the fruit.
Right: First mix the batter, and then fold in the fruit.
Work - Usage: 'Finalize the slides, and then send them to marketing.'
Work - Usage: 'Run the report and then share the figures in the meeting.'
Work (concise): 'Complete the checklist. Then submit it to the lead.'
School - Usage: 'Draft the hypothesis and then design the experiment.'
School - Usage: 'Highlight key passages, and then summarize them in one paragraph.'
School (concise): 'Read the chapter. Then answer the questions.'
Casual - Usage: 'We grabbed coffee and then walked along the river.'
Casual - Usage: 'Wait here and then come inside when I call.'
Casual - Usage: 'She told a joke, and then everyone laughed.'

Rewrite help: fix your own sentence quickly

Three quick checks: (1) Was it a typo? Change 'an' to 'and.' (2) Would 'then' alone be tighter? Remove 'and.' (3) If the clause is long, split into two sentences and start the second with 'Then.'

Rewrite:
Wrong: 'We completed the interview an then uploaded the file.' → 'We completed the interview, and then uploaded the file.'
Rewrite:
Wrong: 'She accepted the offer an then signed the papers.' → 'She accepted the offer. Then she signed the papers.'
Rewrite:
Wrong: 'He paused, an then continued speaking.' → 'He paused, then continued speaking.'
Tighten: 'I woke up late, and then I missed the bus.' → 'I woke up late and missed the bus.' (drop 'then' when meaning remains clear)

Memory trick and proofreading habit

Mnemonic: 'AND adds actions; AN points to a noun.' If you are linking actions, choose 'and.' If you see 'an then,' treat it as a flag to fix.

Search for 'an then' and 'andthen' during proofreading. Fix typos, then check whether 'then' alone might read better.
Read aloud: if it sounds like two actions, 'and then' or 'then' will often be clear.
For repeated mistakes, add a personal autocorrect or run a find-and-replace, then review each instance manually.

Similar mistakes writers make

Related slips include confusing 'then' and 'than,' dropping needed articles, or overusing conjunctions. Spotting one function-word error often reveals others.

'Then' vs 'than' - 'then' signals time; 'than' signals comparison.
Article errors like 'a apple' vs 'an apple' are separate but common proofreading catches.
Avoid stacking connectors: don't repeat 'and then' needlessly across sentences.

Wrong: We were later then you.
Right: We were later than you.
Wrong: She said a apple rolled away.
Right: She said an apple rolled away.

FAQ

Is 'an then' correct English?

No. It is nearly always a typo or transcription error. Replace it with 'and then' to join actions or with 'then' for a tighter sentence.

Should I write 'and then' or just 'then'?

Pick 'and then' for a conversational or narrative tone; pick 'then' for concision and formality. Let rhythm and clarity decide.

Can 'an then' ever be acceptable in dialogue?

Only to reproduce a speaker's deliberate mispronunciation in a transcript or a character's voice. In most editing and publishing, correct it unless the error serves characterization.

Why does my voice-to-text produce 'an then'?

Voice recognition can drop consonants or misinterpret sounds. Train the model, proofread transcripts, and search for this pattern after dictation.

How do I fix repeated 'an then' mistakes in a long document?

Use find-and-replace to change 'an then' to 'and then,' then review each case. Some places will read better as 'then' or as two sentences.

Want a quick sentence check?

Paste uncertain sentences into a grammar checker for a quick flag, then apply the rewrite patterns above for the most natural phrasing in your tone and audience.