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
is investigating
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is investigating" is correct and usable in written English.
It can be used when describing an ongoing inquiry or examination into a particular matter or situation. Example: "The police is investigating the recent theft at the local bank."
✓ Grammatically correct
News & Media
Academia
Science
Alternative expressions(1)
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
The sheriff is investigating.
News & Media
The S.E.C. is investigating.
News & Media
The F.B.I. is investigating.
News & Media
The military is investigating.
News & Media
WorkCover is investigating.
News & Media
The department is investigating.
News & Media
The sheriff's office is investigating.
News & Media
NATO is investigating the episode.
News & Media
The cartel office is investigating.
News & Media
He is investigating it now.
News & Media
A gang unit is investigating.
News & Media
Expert writing Tips
Best practice
When using "is investigating", ensure the context clearly indicates what is being investigated. Providing specific details enhances clarity and avoids ambiguity.
Common error
Avoid using "is investigating" without specifying the subject of the investigation. For example, instead of saying "The company is investigating", specify "The company is investigating the data breach".
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is investigating" functions as a present continuous verb phrase, indicating an ongoing action or process. Ludwig AI confirms its grammatical correctness and widespread use in various contexts.
Frequent in
News & Media
77%
Academia
12%
Science
11%
Less common in
Formal & Business
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
The phrase "is investigating" is a grammatically correct and very common present continuous verb phrase used to describe an ongoing inquiry or examination. Ludwig AI confirms its validity and widespread use. Predominantly found in news and media, it also appears in academic and scientific contexts. Alternatives include "is looking into" and "is examining". When using "is investigating", ensure the subject and object of the investigation are clear to avoid ambiguity. Common errors include vague subject references.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is looking into
This alternative uses a more informal phrasal verb to convey the same meaning.
is examining
This implies a more detailed and careful inspection.
is probing
Suggests a deeper, more thorough inquiry, often into sensitive matters.
is inquiring into
This is a more formal and academic way of saying "is investigating".
is conducting an inquiry
This phrase is more formal and emphasizes the process of investigation.
is carrying out an investigation
Emphasizes the formal and methodical nature of the investigation.
is undertaking a study
Implies a more academic or research-oriented approach.
is researching
Focuses on the systematic gathering of information.
is scrutinizing
Indicates a very close and critical examination.
is checking into
More casual and less formal than "is investigating".
FAQs
How to use "is investigating" in a sentence?
Use "is investigating" to describe an ongoing inquiry or examination into a particular matter. For example, "The police "is investigating" the crime scene".
What can I say instead of "is investigating"?
You can use alternatives like "is looking into", "is examining", or "is probing" depending on the context.
Which is correct, "is investigating" or "are investigating"?
"Is investigating" is used with singular subjects, while "are investigating" is used with plural subjects. For example, "The detective is investigating" versus "The detectives are investigating".
What's the difference between "is investigating" and "is researching"?
"Is investigating" implies an inquiry into a specific incident or issue, often with the goal of uncovering facts or wrongdoing. "Is researching", on the other hand, suggests a broader, more systematic study of a topic.
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested