TOEIC Decision Point

Quick vs Quickly: Choose by Fast Thing or Fast Action

In TOEIC Part 5, quick and quickly often appear in sentences about replies, deliveries, decisions, processing, repairs, service, and changes.

The fast decision is not to ask which word sounds better. Look at what the word is connected to. Is it describing a fast thing or result, or is it describing how something happens?

Core TOEIC rule: Use quick for a fast thing, result, or response. Use quickly when an action happens fast.

The 7-second choice

Quick = fast thing or result

Use quick when the next idea is a thing, result, reply, decision, visit, or process.

Signal: quick response, quick decision, quick review, quick service

Quickly = action happens fast

Use quickly when the sentence shows how someone does something or how something changes.

Signal: respond quickly, move quickly, process quickly, change quickly

The signal to remember

In TOEIC, the answer is often decided by the word after the blank or the action near the blank.

The customer service team gave a quick response to the complaint.

Why: response is the thing being described.

The customer service team responded quickly to the complaint.

Why: responded is the action happening fast.

The manager made a quick decision after reviewing the proposal.

Why: decision is the thing being described.

The manager decided quickly after reviewing the proposal.

Why: decided is the action happening fast.

What TOEIC wants you to notice

The same business idea can use quick or quickly depending on the sentence shape. Do not choose from meaning alone.

Quick patterns

quick reply, quick update, quick meeting, quick repair, quick delivery, quick check

Quickly patterns

reply quickly, update quickly, meet quickly, repair quickly, deliver quickly, check quickly

Watch the small words

Words like a, the, and very often point to quick. Action words often point to quickly.

The technician completed a quick repair before the store opened.

Decision: repair is the thing being described.

The technician repaired the machine quickly before the store opened.

Decision: repaired is the action happening fast.

The company needs a quick update before sending the report.

Decision: update is the thing being described.

Quick TOEIC check

Choose by checking whether the sentence describes a fast thing or a fast action. This is a micro-diagnostic, not a score test.

1. The receptionist gave visitors a ___ explanation of the new check-in system.
2. The IT department resolved the network issue ___.
3. The marketing team held a ___ meeting before the product launch.
4. Orders placed before noon are usually processed ___.

The mistake fast readers make

Fast readers often see the idea of speed and choose by feeling. That is risky because both words can connect to speed. The real decision is where the speed sits in the sentence.

Weak choice

“The sentence means fast, so either quick or quickly should work.”

Better choice

“Is this a fast thing, or is an action happening fast?”

Why this mistake returns under pressure

Quick and quickly look simple during review. Under time pressure, test-takers often stop checking the word after the blank and choose from meaning only.

One-second tool: Fast thing = quick. Action happens fast = quickly.

Use small TOEIC mistakes as a diagnostic

If you know quick and quickly during study but miss them under time pressure, the problem may not be word meaning. It may be your checking order.

My TOEIC Coach helps test-takers notice these small decision habits and build a more reliable approach to Part 5.

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FAQ (EN) — Why “He Runs Quick” Is Wrong 1. Q: Why is “He runs quick” wrong? A: Because “runs” is an action. You need an adverb to describe it. The correct sentence is “He runs quickly.” 2. Q: What’s the difference between “quick” and “quickly”? A: “Quick” describes a thing (e.g., a quick meeting). “Quickly” describes an action (e.g., leave quickly). 3. Q: When do I use words ending in “-ly”? A: Use “-ly” words when describing how something is done. Example: “She answered clearly.” 4. Q: Can I say “She speaks fluent English”? A: No. You should say “She speaks fluently” or “She is fluent in English.” 5. Q: Why is “He answered correct” wrong? A: “Answered” is an action. You need an adverb: “He answered correctly.” 6. Q: Is “fastly” a real word? A: No. “Fast” is both an adjective and adverb. Use “He runs fast,” not “fastly.” 7. Q: What does TOEIC test with words like “clear” and “clearly”? A: TOEIC tests whether you know when to describe a thing (use “clear”) or an action (use “clearly”). 8. Q: Is “He explained it polite” correct? A: No. You need the adverb: “He explained it politely.” 9. Q: Why does TOEIC use “efficient” and “efficiently” in questions? A: To test if you recognize whether the sentence describes a method (action = “efficiently”) or quality (thing = “efficient”). 10. Q: How do I choose between “quiet” and “quietly”? A: “Quiet” describes something (e.g., a quiet room). “Quietly” describes how something is done (e.g., speak quietly). 11. Q: Can “hard” be used like an adverb? A: Yes. “She works hard” is correct. “Hardly” means “almost not at all,” which is different. 12. Q: What’s the difference between “late” and “lately”? A: “Late” means after the expected time. “Lately” means “recently.” Example: “He arrived late.” vs. “Lately, he’s been tired.” 13. Q: Why do I get confused by “clear” and “clearly”? A: Because they both look similar. Remember: use “clearly” when describing actions like speaking or explaining. 14. Q: Is “The teacher speaks calm” okay? A: No. It should be “The teacher speaks calmly.” 15. Q: Can I say “The report is clearly”? A: No. That’s describing the report, not an action. Use “The report is clear.” 16. Q: What does “She smiled polite” mean? A: It’s incorrect. Use “She smiled politely” to describe how she smiled. 17. Q: How can I tell if I need an adjective or adverb in TOEIC? A: Look at what’s being described. If it’s an action, use the “-ly” adverb form. 18. Q: Is “The device works good” wrong? A: Yes. The correct phrase is “The device works well.” “Well” is the adverb of “good.” 19. Q: Why does TOEIC include fake words like “fastly”? A: To trick you. “Fastly” looks right, but it’s wrong. “Fast” is already correct as an adverb. 20. Q: What’s the fastest way to check if I picked the right word? A: Ask yourself: “Is this describing how something is done?” If yes, use the adverb with “-ly.”