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
they are built
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "they are built" is grammatically correct and can be used in written English.
Example: The houses in this neighborhood are built with high-quality materials, ensuring durability and longevity.
✓ 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
59 human-written examples
But they are built from historical data.
News & Media
They are built up step by step.
News & Media
But they are built to last.
News & Media
They are built for speed.
News & Media
Well, they are built for you.
News & Media
"Now they are built on shifting sands.
News & Media
They are built on landfill, or reclaimed swamp.
News & Media
Let's hope they are built for trans-oceanic travel.
News & Media
They are built upon it like ancient burial grounds.
News & Media
They are built on posts with nothing underneath the house".
News & Media
They are built, quite literally, on shifting sands.
News & Media
Expert writing Tips
Best practice
When using "they are built", ensure that the pronoun "they" clearly refers to a specific subject to avoid ambiguity. For instance, instead of "They are built to last", specify "These houses are built to last".
Common error
Avoid using "they are built" when an active voice construction would be clearer and more direct. For example, instead of "The houses are built by the company", consider "The company builds the houses."
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they are built" primarily functions as a passive voice construction, indicating that a group of items or entities has undergone the process of being constructed or created. As Ludwig AI confirms, the phrase is grammatically correct and suitable for use in various contexts. Examples show it describing physical structures, abstract systems, and even personal qualities.
Frequent in
News & Media
66%
Science
23%
Formal & Business
3%
Less common in
Encyclopedias
2%
Wiki
1%
Reference
0%
Ludwig's WRAP-UP
In summary, "they are built" is a grammatically correct and versatile phrase used to describe the construction or creation of various entities. As Ludwig AI states, this phrase is suitable for a wide range of contexts, with high frequency in news, scientific, and business publications. When using this phrase, ensure the pronoun "they" has a clear antecedent and consider whether active voice would be more direct. Related phrases include "they are constructed", "they are created", and "they are manufactured", each with slightly different connotations. The phrase's widespread use and straightforward meaning contribute to its expert rating of 4.5.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
they are constructed
Focuses on the action of building or assembling something.
they are manufactured
Emphasizes mass production or industrial creation.
they are created
Highlights the act of bringing something into existence.
they are designed
Focuses on the planning and intention behind the creation.
they are formed
Suggests a natural process of development or shaping.
they are assembled
Implies putting together pre-existing parts.
they are fabricated
Highlights the process of making something from raw materials, sometimes implying deception.
they are erected
Emphasizes the vertical construction or raising of something.
they are developed
Focuses on gradual growth and improvement over time.
they are composed
Indicates that something is made up of various elements or components.
FAQs
How can I use "they are built" in a sentence?
Use "they are built" to describe the construction or creation of multiple items. For example, "The bridges "they are built" to withstand strong winds."
What is an alternative to saying "they are built"?
Alternatives include phrases like "they are constructed", "they are created", or "they are manufactured", depending on the specific context.
Is it better to use active or passive voice with "they are built"?
While "they are built" is grammatically correct in passive voice, active voice can sometimes be more direct and clearer. Consider if the actor is important; if so, use active voice (e.g., "Engineers build them").
What's the difference between "they are built" and "they were built"?
"They are built" indicates present tense, suggesting ongoing or habitual construction. "They were built" indicates past tense, referring to construction that occurred at a specific time in the past.
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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