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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
they did
Grammar usage guide and real-world examplesUSAGE SUMMARY
"they did" is a correct and usable phrase in written English.
You can use it when referring to something that was done in the past. For example, "They did their best to get the job done."
✓ 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
19 human-written examples
They did, they did.
News & Media
(They did).
News & Media
They did what they did".
News & Media
They decided they did.
News & Media
They wish they did.
News & Media
In practice they did not.
Human-verified similar examples from authoritative sources
Similar Expressions
36 human-written examples
What will they do?
Science
What can they do?
Science
How do they do this?
Science
They think they do.
News & Media
They do and they don't.
News & Media
Expert writing Tips
Best practice
Use "they did" to provide a concise and direct confirmation of a previous statement or question, avoiding unnecessary repetition.
Common error
While grammatically sound, avoid using "they did" excessively in formal writing. Opt for more sophisticated vocabulary to maintain a professional tone.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they did" serves as a grammatical substitute for a previously mentioned verb phrase. It affirms or confirms the completion of an action. As seen in Ludwig, its function is primarily to avoid repetition and provide a concise response. For example, instead of repeating the verb, "they did" simply confirms that an action occurred.
Frequent in
News & Media
30%
Science
50%
Formal & Business
20%
Less common in
Wiki
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "they did" is a grammatically correct and commonly used expression to confirm a previous statement or action. Ludwig AI indicates that its primary function is to avoid repetition and provide concise confirmation. While versatile, it's most appropriate for neutral and informal contexts, as formal writing may benefit from more sophisticated alternatives. The phrase appears frequently in "News & Media" and "Science" contexts, making it a reliable and understandable way to express affirmation.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
they certainly did
Emphasizes the affirmative nature of the action more strongly than "they did".
they actually did
Highlights that the action happened, potentially against expectations.
they really did
Adds emphasis and sincerity to the statement that they performed the action.
they went ahead and did it
Implies a sense of initiative or perhaps overcoming obstacles to complete the action.
they successfully executed it
Focuses on the successful completion of a task or plan.
indeed, they performed the action
A more formal and emphatic way of stating that they completed the action.
they carried it out
Focuses on the execution of a plan or task.
they brought it to fruition
Suggests that an effort resulted in a successful outcome.
they accomplished that
Highlights the successful completion of something.
they were successful in doing so
Formally acknowledges the successful achievement of something
FAQs
How can I use "they did" in a sentence?
Use "they did" to confirm that a group or entity completed an action, as in, "Did they finish the project? Yes, "they did"."
What's a more formal way to say "they did"?
In formal contexts, consider using phrases like "they accomplished that", "they executed the plan", or "they successfully completed it".
Is it ever incorrect to use "they did"?
While grammatically correct, overuse in formal writing might sound repetitive. Strive for varied language.
What is the difference between "they did" and "they've done"?
"They did" refers to a completed action in the past, whereas "they've done" (they have done) implies an action completed at an unspecified time in the past or with relevance to the present.
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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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested