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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
had been combined
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "had been combined" is correct and usable in written English.
It is typically used to indicate that two or more elements were merged or brought together at some point in the past. Example: "The ingredients had been combined before the cooking process began, ensuring a uniform flavor throughout the dish."
✓ Grammatically correct
News & Media
Science
Formal & Business
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
55 human-written examples
When a proposed combination of drugs had not previously been reported, dosing was established by studying how each component of the proposed combination had been combined with other cytotoxic agents similar to those being considered for combination therapy.
Science
Two apartments had been combined into one.
News & Media
Nabisco and R. J. Reynolds had been combined until about a year ago.
News & Media
He said that if their votes in Michigan had been combined, Mr. Romney would have lost.
News & Media
"If these low rankings had been combined with residents' rankings to award points, Russia and Ukraine would have both wound up with more zeroes.
News & Media
About a week after that, Ms. Halsband produced drawings and schematic plans for the reconfigured house and studio, which, not surprisingly, had been combined into one interconnected building.
News & Media
He said the smaller spaces had been combined to produce offices that would be attractive to design and communications firms attracted to an urban, but small-scale location.
News & Media
Mr. Huey's own spinoff, eCompany Now, created nervous reaction from some readers who saw that the January and February issues had been combined into one.
News & Media
Pyrethroid had been combined with nets before, but doing so on the nanoscale means the particles are small enough to cling to the fibres even when washed.
News & Media
They found the solution in a pair of nearby town houses that had been combined to create a generous single-family home.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
Even after one exposure to the composites, neurons that had previously fired exclusively in response to one picture like that of Eastwood significantly increased their firing rate when exposed to the image with which it had been combined in one case, by 230%, Fried and colleagues report today in the journal Neuron.
Science & Research
Expert writing Tips
Best practice
Use "had been combined" to clearly indicate that the action of combining occurred in the past and is now a completed state. It is useful for establishing context and sequence in narratives or reports.
Common error
Avoid using "was combined" when you need to emphasize that the action of combining happened before a specific point in the past. "Was combined" lacks the sense of completion that "had been combined" provides.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "had been combined" functions as a verb phrase in the past perfect passive voice. Ludwig confirms this through numerous examples, indicating that it describes an action completed before another point in the past. It highlights a state resulting from a previous combination.
Frequent in
News & Media
42%
Science
40%
Wiki
10%
Less common in
Formal & Business
5%
Encyclopedias
2%
Reference
1%
Ludwig's WRAP-UP
In summary, "had been combined" is a grammatically sound and frequently used phrase in the past perfect passive voice. As Ludwig confirms, its primary function is to describe a completed action of merging or uniting that occurred before a specific point in the past. It is commonly found in news, scientific writing, and general contexts. While "had been combined" exhibits a neutral to formal register, ensuring correct tense usage and avoiding confusion with simpler past tenses like "was combined" will enhance clarity in writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
had been merged
Focuses on the blending of two or more entities into a single unit.
had been integrated
Emphasizes the incorporation of separate elements into a cohesive whole.
had been united
Highlights the joining together of different parts for a common purpose.
had been amalgamated
Suggests a more formal or official merging of organizations or entities.
had been consolidated
Implies the strengthening of a system by bringing together its components.
had been coupled
Highlights elements that become associated but can also remain distinct.
had been linked
Highlights elements that become related and connected.
had been connected
Focuses on the establishment of a relationship or association between entities.
had been mixed
Highlights that two or more things have been mingled together.
had been incorporated
Stresses the inclusion of something as part of a larger whole.
FAQs
How can I use "had been combined" in a sentence?
Use "had been combined" to describe a past action of merging or uniting two or more things. For example, "The two companies "had been combined" before the new product launch."
What are some alternatives to "had been combined"?
You can use alternatives such as "had been merged", "had been integrated", or "had been united depending on the specific context and nuance you want to convey.
Which is correct, "was combined" or "had been combined"?
Both "was combined" and ""had been combined"" can be correct, but they indicate different tenses. "Was combined" describes a simple past action, while ""had been combined"" indicates that the action was completed before another point in the past.
What is the difference between "had been combined" and "were combined"?
"Were combined" describes a past action, often as a general statement. "Had been combined" indicates that the action was completed before another point in the past, emphasizing the sequence of events.
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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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested