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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
have affect
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "have affect" is not correct in standard written English.
The correct term is "have an effect," which is used to indicate that something has an influence or impact on something else. Example: "The new policy will have an effect on employee productivity."
⚠ May contain grammatical issues
News & Media
Science
Wiki
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
18 human-written examples
The tension could have affect customers.
News & Media
She had expected to negotiate the 'Ndrangheta way: reveal little of what you have, affect nonchalance, and eventually extract as much as possible for as little as possible.
News & Media
The additional work for the special edition of "S.N.L". on Feb. 1 will not have affect the show's regular Saturday edition that week because no live show is scheduled for Feb. 3.
News & Media
It responded much as its big tech colleagues have: affect shock, assure users this was never intended and promise action.
News & Media
The findings of historical geographers can provide origins, processes and causes of environmental crises to help environmental historians to construct their stories which will help today's people understand how human activities in the past as well as in the present have affect the Earth's environment and how they should do to prevent further deterioration of the our environment.
Science
"I thus still retain my prejudice: Underwear have affect on your ejaculation during a dream," Unionac wrote in one post.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
42 human-written examples
They have affecting moments.
News & Media
That crack might have affected the reactor".
News & Media
These concerns have affected newsrooms everywhere.
News & Media
These fears have affected behavior.
News & Media
Plenty of them have affecting musical lines.
News & Media
Expert writing Tips
Best practice
Always use "have an effect on" instead of "have affect". Remember that "affect" is typically a verb, while "effect" is typically a noun. For example: "The weather will "have an effect on" the crops."
Common error
Avoid using "affect" as a noun. The phrase "have affect" is incorrect because "affect" is generally a verb. Instead, use "have an effect", where "effect" is a noun.
Source & Trust
82%
Authority and reliability
1.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "have affect" attempts to express causation or influence. However, it is grammatically flawed as it incorrectly uses "affect" (primarily a verb) in a context where a noun is required. Ludwig indicates that this phrase is not correct in standard written English.
Frequent in
News & Media
33.3%
Science
55.6%
Wiki
5.6%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "have affect" is a common grammatical error. As Ludwig points out, the correct form is ""have an effect on"" or simply "affect" (as a verb). The confusion arises from incorrectly using "affect" as a noun. While the phrase appears across various sources, including news and scientific publications, its consistent misuse makes it grammatically incorrect. Remember that while the intention might be understood, using the correct grammar ensures clarity and credibility in your writing. To avoid this error, always remember that "affect" is typically a verb, and "effect" is typically a noun. If you want to use "effect" with "have", ensure you include "an" before it. For clarity and correctness, consider using alternative phrases like "have an impact on" or rephrasing the sentence to use "influence" or "affect" as a verb.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
have an effect on
Replaces "affect" (verb) with "effect" (noun) in a grammatically correct construction. Adds "on" to specify the target of the effect.
have an impact on
Substitutes "effect" with "impact", another noun indicating influence, while maintaining grammatical correctness.
influence
Replaces the entire phrase with a single verb, "influence", directly expressing the action of affecting something.
affect
Uses the verb "affect" correctly, without the auxiliary verb "have", to indicate causing a change or influence.
have influence on
Replaces "affect" with the noun "influence", using a grammatically correct structure.
have consequences for
Focuses on the results or outcomes of an action, rather than the direct influence.
exert influence on
Emphasizes the active application of influence.
bear on
A more formal way of saying have an effect on something.
carry weight with
Implies that something is important or influential to someone.
play a role in
Indicates partial influence within a larger process.
FAQs
What's the proper way to say something influences something else?
Instead of the incorrect "have affect", use ""have an effect on"". For example, "The new policy will "have an effect on" employee morale".
Is it correct to say "have affect"?
No, "have affect" is grammatically incorrect. The correct phrase is "have an effect". "Affect" is primarily a verb, while "effect" is a noun.
What are some alternatives to "have an effect on"?
You can use alternatives such as "influence", "impact", or "affect" (as a verb). For instance, "The decision "influenced" the outcome".
Which is correct, "have affect" or "affect"?
"Affect" is correct when used as a verb. "Have affect" is incorrect. For example, "The weather "affects" my mood" is correct.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
1.8/5
Expert rating
Real-world application tested