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
had collaborated
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "had collaborated" is correct and usable in written English.
It is typically used to indicate that two or more parties worked together on a project or task in the past, often before another event in the timeline. Example: "Before launching the new product, the team had collaborated with several experts in the field to ensure its success."
✓ Grammatically correct
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
60 human-written examples
Some villagers had collaborated with the guerrillas.
News & Media
It helped that the two had collaborated before.
News & Media
Some had collaborated with the Nazis and feared retaliation.
Encyclopedias
Gordon and Intel had collaborated and rehearsed this for months.
News & Media
(Williams and Richard Neutra had collaborated on a government housing project a few years earlier).
News & Media
Some of his critics said he had collaborated with the Ceausescu regime.
News & Media
By the mid-eighties, Gaultier had collaborated with a number of artists.
News & Media
Mr Galloway attacked Mr Muhsin, saying that the IFTU had collaborated with the British government.
News & Media
He had collaborated on the former Texas Tech football coach Mike Leach's new autobiography.
News & Media
The two had collaborated with other horses, but had not had much success.
News & Media
I lost Russell Churney, the pianist [with whom Clary and Jungr had collaborated for years].
News & Media
Expert writing Tips
Best practice
When using "had collaborated", ensure the context clearly indicates what the parties worked on together and the outcome of their collaboration. For example: "The researchers had collaborated on the study, resulting in a breakthrough discovery."
Common error
Avoid using "had collaborated" when the context requires a different tense, such as simple past ("collaborated") if the collaboration is the main focus of the sentence and there's no need to emphasize its completion before another event.
Source & Trust
84%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "had collaborated" functions as the past perfect tense of the verb "collaborate". It indicates that an action of working together occurred and was completed before another action or time in the past. Ludwig AI also confirms this through its examples.
Frequent in
News & Media
52%
Wiki
23%
Science
17%
Less common in
Encyclopedias
2%
Formal & Business
2%
Los Angeles Times
2%
Ludwig's WRAP-UP
In summary, "had collaborated" is a grammatically sound and frequently used past perfect verb phrase, indicating a completed collaborative action before another point in the past. Ludwig AI confirms its correctness. It finds its use primarily in News & Media, Wiki, and Science contexts. For alternative phrasing, consider options like ""had worked together"" or "had partnered", adjusting for the specific nuance you intend to convey. When writing, pay attention to tense consistency to ensure accurate communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
had worked together
This alternative is a more general way of expressing that two or more parties engaged in a joint effort.
had partnered
This suggests a more formal or structured collaboration, often implying a business or professional relationship.
had teamed up
This implies a more informal and often temporary collaboration, like in sports or short-term projects.
had cooperated
This suggests a willingness to work together, often in the face of challenges or differing opinions.
had joined forces
This implies a more forceful or strategic collaboration, often to achieve a common goal or overcome an obstacle.
had combined efforts
This emphasizes the pooling of resources and skills to achieve a shared objective.
had acted jointly
This suggests a coordinated and synchronized action, often in a legal or political context.
had participated together
This is a more basic way of saying that two or more parties were involved in the same activity.
had associated
This suggests a connection or alliance, but not necessarily active collaboration.
had allied
This implies a strategic alliance, often between groups or organizations with shared interests.
FAQs
How do I use "had collaborated" in a sentence?
Use "had collaborated" to indicate that two or more parties worked together on a project or task before a specific point in time. For example, "Before the product launch, the teams "had worked together" on several key features."
What's a simpler way to say "had collaborated"?
You can use phrases like ""had worked together"", "had teamed up", or "had partnered" depending on the specific nuance you want to convey.
Is it correct to say "have collaborated" instead of "had collaborated"?
The choice between "have collaborated" and "had collaborated" depends on the context. "Have collaborated" indicates a collaboration that occurred at some point in the past and is relevant to the present. "Had collaborated" indicates a collaboration that was completed before a specific point in the past.
What's the difference between "had collaborated" and "collaborated"?
"Collaborated" is the simple past tense, indicating an action that occurred and finished in the past. "Had collaborated" is the past perfect tense, indicating an action that was completed before another action in the past. For example, "They collaborated on the project last year" vs. "They had partnered on several projects before launching this one."
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
84%
Authority and reliability
4.6/5
Expert rating
Real-world application tested