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
completed by
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "completed by" is correct and usable in written English.
You can use it when you are referring to something that has been finished or resolved. For example, you might say, "The project was successfully completed by the end of the week."
✓ Grammatically correct
News & Media
Encyclopedias
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
It could be completed by early March.
News & Media
Major construction was completed by 2003.
Encyclopedias
This work will be completed by December.
News & Media
The work should be completed by Tuesday.
News & Media
Work is to be completed by November.
News & Media
A second restoration was completed by 1983.
Encyclopedias
Withdrawal from Syria was completed by April 1946.
Encyclopedias
A deal could be completed by next week.
News & Media
The line would be completed by 2012.
News & Media
Travel must be completed by Dec. 17.
News & Media
It is to be completed by 2015.
News & Media
Expert writing Tips
Best practice
When using "completed by" to indicate a deadline, ensure the context clearly specifies who or what is responsible for the completion. For instance, "The report must be completed by the team" clarifies responsibility.
Common error
Avoid using "completed by" when active voice provides more clarity and impact. Instead of "The task was completed by John", use "John completed the task" for a more direct statement.
Source & Trust
81%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "completed by" primarily functions as a prepositional phrase used in the passive voice to indicate the agent that performed an action or to specify a deadline. Ludwig AI analysis of the examples show the phrase being used in both contexts across different domains.
Frequent in
News & Media
40%
Science
28%
Wiki
23%
Less common in
Encyclopedias
7%
Formal & Business
1%
Social Media
1%
Ludwig's WRAP-UP
In summary, "completed by" is a versatile prepositional phrase, suitable for indicating agency or setting deadlines. Ludwig AI analysis confirms that it is grammatically sound and widely used across diverse contexts, including news, science, and general writing. While generally neutral in tone, it can lean towards formality when used in scientific or academic contexts due to its association with passive voice. Remember to use active voice when a more direct tone is needed and to be mindful of the clarity of your sentences to maximize the impact of "completed by".
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
finished by
This alternative is a direct synonym, emphasizing the state of being done.
executed by
This alternative highlights the act of performing or carrying out a task.
performed by
This alternative focuses on the action of carrying out a task or activity.
accomplished by
This alternative emphasizes the successful achievement of something through someone's actions.
conducted by
This alternative emphasizes the process of organizing and carrying out an action.
achieved by
This alternative focuses on the attainment of a goal or objective through someone's effort.
finalized by
This alternative highlights the concluding stage of a process being carried out by someone.
fulfilled by
This alternative emphasizes the satisfaction of a requirement or condition through someone's actions.
effected by
This alternative emphasizes the bringing about or causing of a result by someone.
realized by
This alternative focuses on the actualization or making something concrete through someone's effort.
FAQs
How can I use "completed by" in a sentence?
Use "completed by" to show who or what finished a task or when something should be done, as in, "The project was "finished by" the team" or "The assignment must be completed by Friday".
What are some alternatives to "completed by"?
Depending on the context, you can use alternatives like ""finished by"", "executed by", or "performed by" to vary your phrasing.
Is it better to use active or passive voice with "completed by"?
While "completed by" is grammatically correct in passive voice, using active voice often creates a more direct and impactful sentence. For example, instead of "The analysis was completed by ZH", consider "ZH completed the analysis".
What does "completed by" mean in the context of deadlines?
When referring to deadlines, "completed by" means that the task or project must be fully finished on or before the specified date or time. For instance, "The report must be "finished by" the end of the day" indicates the report's deadline.
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
81%
Authority and reliability
4.6/5
Expert rating
Real-world application tested