"Affect" vs "effect" - what's the difference?
"Affect" is usually a verb; "effect" is usually a noun. Here's the simple rule and the exceptions that trip up native speakers.
The simple rule
- "The rain affected the match." (the rain did something to the match)
- "Stress affects your sleep."
- "The rain had a big effect on the match." (the result/consequence)
- "The side effects were minimal."
Quick test
Try replacing with "impact." If you'd use "impacted" β affect (verb). If you'd use "an impact" β effect (noun).
The exceptions (native speakers get these wrong too)
- "To effect change" - effect as a verb meaning "to bring about." Rare but correct.
- "The affects" - affect as a noun in psychology, meaning emotional response. Very specialised.
Most common mistake
"The decision effected everyone" - should be "affected."
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This distinction matters in formal writing. In casual speech, the wrong choice is rarely noticed.
What's the difference between "Affect" and "effect"?
"Affect" is usually a verb; "effect" is usually a noun. Here's the simple rule and the exceptions that trip up native speakers.
Is "Affect vs effect" formal or informal?
This distinction matters in formal writing. In casual speech, the wrong choice is rarely noticed.
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