though (through)

Quick answer

Though signals contrast or concession; through signals movement, duration, or completion. Pick though when you mean "however" or "even so"; pick through when you mean "across," "during," or "until."

Core explanation

Though is a conjunction or adverb that introduces contrast: it often means "however," "even though," or "despite that." It can begin a clause ("Though it rained, we went out.") or appear at the end as a short contrast ("I liked it, though.").

Through is a preposition or adverb that indicates movement from one side to the other, movement inside something, duration, or completion. Use it for physical motion ("She drove through the tunnel"), time spans ("open through Friday"), and processes that continue to an end ("work through the checklist").

Hyphenation and spelling

Neither word uses a hyphen. Both are single words in standard English. The informal spelling thru appears on signs and in casual contexts but is not standard in formal writing.

Grammar notes

Though can act like a conjunction (joining clauses) or as a sentence adverb. Through functions as a preposition or adverb; it does not introduce a contrasting clause.

Real usage patterns

• Contrast / concession: though, although, even though - used to admit an opposing point.
• Movement / completion / duration: through, across, during, until - used for physical or temporal passage.
• Placement clues: If you can replace the word with "however" or "although," use though. If you can replace it with "during" or "until" or "across," use through.

How to fix and rewrite sentences

Check the meaning first, then choose the word. A quick three-step fix:

• Identify whether the sentence needs contrast (though) or movement/duration (through).
• Swap in the candidate word and read the sentence for clarity.
• Rewrite for flow if the direct swap sounds awkward.

Three rewrite templates you can copy:

• Contrast template: "[Clause A], though [clause B]." → "I wanted to leave early, though I stayed until the end."
• Duration template: "[Subject] [verb] through [time period]." → "She worked through the weekend."
• Movement template: "[Subject] moved through [place]." → "He walked through the crowd."

Examples you can copy (wrong → right)

Clear pairs that show the common swaps people make.

• Wrong: She walked though the door.
  Right: She walked through the door.
• Wrong: I enjoyed the lecture, through it was long.
  Right: I enjoyed the lecture, though it was long.
• Wrong: We'll be open though Friday.
  Right: We'll be open through Friday.
• Wrong: He finished the race though the pain.
  Right: He finished the race through the pain.
• Wrong:Through she was tired, she kept studying.
  Right:Though she was tired, she kept studying.
• Wrong: I called you though the meeting ended.
  Right: I called you after the meeting ended OR I called you through the meeting (only if you mean during it).

Work, school, and casual examples

Situational examples make the choice obvious. Each set includes typical misuses and clear corrections.

• Work - Wrong: I'll be available though Monday. Work -
  Right: I'll be available through Monday.
• Work - Wrong: The team, through, exceeded the target. Work -
  Right: The team, though, exceeded the target.
• Work - Wrong: We pushed the rollout though the weekend. Work -
  Right: We pushed the rollout through the weekend.
• School - Wrong: I studied though the exam. School -
  Right: I studied through the night for the exam.
• School - Wrong:Through the proof was tricky, I followed it. School -
  Right:Though the proof was tricky, I followed it.
• School - Wrong: She read the chapter though class. School -
  Right: She read the chapter before class OR She read the chapter through class (only if during class).
• Casual - Wrong: He slipped though the puddle. Casual -
  Right: He slipped through the puddle.
• Casual - Wrong: I like that song, through it's slow. Casual -
  Right: I like that song, though it's slow.
• Casual - Wrong: Meet me though Friday? Casual -
  Right: Meet me through Friday? (if you mean available until Friday) or Meet me on Friday? (if you mean a day)

A simple memory trick

Remember by meaning rather than sound. Ask: "Do I mean 'however' or 'during/throughout/movement'?" If the answer is "however," use though. If it's "across, during, until, or to the end of," use through.

• Think: though = "tho" = contrast ("I liked it, tho").
• Think: through = "thru" = movement or duration ("open thru Friday," "go thru the tunnel").
• Scan your sentence for time/place clues (through) or contrast words (though).

Similar mistakes to watch for

• Thru - informal spelling of through; okay in signs and casual notes, avoid in formal writing.
• Although / though - both signal contrast; use although to sound more formal.
• Throughout - means "during the entire time" and is different from both words.
• Other split-word errors and hyphen confusion - watch for spacing errors, but these two words are single words.

FAQ

Can I end a sentence with "though"?

Yes. "I liked it, though." is a common and natural use when you want a short contrast after a sentence.

Is "thru" correct?

Thru is an informal spelling of through. It appears in signage and casual contexts but is not standard in formal writing or most publication styles.

Can "through" ever mean contrast?

No. If you need contrast, use though, although, or a similar conjunction. Through does not introduce opposing clauses.

What if both words feel possible?

Read the sentence replacing the word with "however" (for though) and "during/until/across" (for through). The substitution that preserves meaning is the correct choice.

What's the fastest proofreading trick?

Read the sentence aloud and pause at the target word. If you naturally say "however" or "but," use though. If you say "during" or "until" or "across," use through.

Check the whole sentence before you send it

Fixing a single word often requires a quick read of the whole line. When in doubt, rewrite to make the intended meaning obvious.