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Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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completed by

Grammar usage guide and real-world examples

USAGE 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

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

It could be completed by early March.

News & Media

The New York Times

Major construction was completed by 2003.

This work will be completed by December.

News & Media

Independent

The work should be completed by Tuesday.

News & Media

The New York Times

Work is to be completed by November.

News & Media

The New York Times

A second restoration was completed by 1983.

Withdrawal from Syria was completed by April 1946.

A deal could be completed by next week.

The line would be completed by 2012.

News & Media

The New York Times

Travel must be completed by Dec. 17.

It is to be completed by 2015.

News & Media

The New York Times
Show more...

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.

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

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.

Expression frequency: Very common

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".

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.

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Source & Trust

81%

Authority and reliability

4.6/5

Expert rating

Real-world application tested

Most frequent sentences: