Used and loved by millions
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 decreased
Grammar usage guide and real-world examplesUSAGE SUMMARY
"have decreased" is a correct and usable phrase in written English.
You could use it to describe a decrease that has already happened. For example, "Sales of the product have decreased drastically in the past year."
✓ Grammatically correct
News & Media
Science
Academia
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
60 human-written examples
Instead they have decreased.
News & Media
Drunken brawls have decreased.
News & Media
Recently these isotopes have decreased significantly.
News & Media
Even the sizes of salmon have decreased.
News & Media
Those winds have decreased, the paper finds.
News & Media
Since then the numbers have decreased dramatically.
News & Media
His field-goal attempts and free-throw attempts have decreased.
News & Media
Since retirement, with her medications regulated, her seizures have decreased.
News & Media
"But with each contract, our benefits have decreased".
News & Media
Murder and robbery were said last year to have decreased.
News & Media
Job openings for executives in Asia have decreased.
News & Media
Expert writing Tips
Best practice
When using "have decreased", ensure the subject and verb agree in number. For example, "The number of students has decreased" (singular) versus "Student enrollments have decreased" (plural).
Common error
Avoid using "have decreased" when referring to a future decrease. Use "will decrease" or "are expected to decrease" instead.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "have decreased" functions as a present perfect verb phrase, indicating an action (decreasing) that started in the past and has relevance to the present. Ludwig AI confirms this usage. Examples in Ludwig show it describing changes over time.
Frequent in
News & Media
62%
Science
22%
Academia
8%
Less common in
Wiki
3%
Formal & Business
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "have decreased" is a grammatically correct and very common phrase used to indicate a reduction or decline that has occurred over time. Ludwig AI confirms its wide applicability. The phrase appears most frequently in News & Media, Science, and Academic contexts. When writing, it's essential to ensure subject-verb agreement and avoid using it to describe future decreases. Consider alternatives like "have declined" or "have fallen" for nuanced meaning. Pay attention to the tense when describing decreasing events.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
have diminished
Focuses on a gradual reduction or lessening.
have declined
Implies a downward trend or deterioration.
have fallen
Suggests a drop or reduction in quantity or level.
have lessened
Emphasizes the reduction in intensity or severity.
have receded
Implies a withdrawal or backing away from a previous level.
have shrunk
Focuses on a reduction in size or volume.
have dwindled
Suggests a gradual and continuous reduction to a small amount.
have slumped
Implies a sudden and significant drop.
have deteriorated
Focuses on a decline in quality or condition.
have eroded
Suggests a gradual wearing away or reduction over time.
FAQs
How do I use "have decreased" in a sentence?
Use "have decreased" to describe something that has lessened or diminished over time. For example, "The number of available jobs "have decreased" significantly this year".
What are some alternatives to "have decreased"?
You can use alternatives like "have declined", "have fallen", or "have diminished" depending on the context.
Is it correct to say "has decreased" instead of "have decreased"?
It depends on the subject. Use "has decreased" with singular nouns or uncountable nouns (e.g., "The price has decreased"). Use "have decreased" with plural nouns (e.g., "Prices have decreased").
What's the difference between "have decreased" and "are decreasing"?
"Have decreased" indicates a completed action, while "are decreasing" ("are decreasing") suggests an ongoing process. For example, "Sales have decreased" means sales are already lower, whereas "Sales are decreasing" means they are currently in the process of declining.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested