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
this is the reason
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'this is the reason' is correct and usable in written English.
It is often used to explain or introduce a point. For example, "I have decided to not take the job offer. This is the reason why I'm making this choice; I don't think the salary is enough for me to live on."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(20)
that is the word
that's the aim
that's the purpose
this is the point
that's the objective
that's the goal
that is the plan
that is the intention
that is the question
consequently
that is the dilemma
that is the idea
that is why
that is the reason
as a result
that is the goal
that's the intention
that is the situation
for that reason
therefore
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
This is our promise: this is the reason for REASON".
News & Media
This is the reason.
News & Media
And this is the reason.
News & Media
So this is the reason, probably.
Academia
This is the reason I'm still alive.
News & Media
This is the reason my relationships collapse.
News & Media
This is the reason they give.
News & Media
This is the reason for our resistance.
News & Media
This is the reason I like tennis.
News & Media
And this is the reason to celebrate.
News & Media
"This is the reason we are here".
News & Media
Expert writing Tips
Best practice
When using "this is the reason", ensure the explanation is concise and directly relevant to the statement it follows. Avoid introducing unrelated or tangential details.
Common error
Avoid using "this is the reason" without a preceding statement or situation to which it refers. Ensure that the connection between the statement and the reason is clear to the reader to prevent confusion.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "this is the reason" functions as a connector or linking phrase, introducing an explanation or justification for a preceding statement or action. According to Ludwig AI, the phrase is commonly used in written English. Examples found in Ludwig demonstrate its widespread use across varied contexts.
Frequent in
News & Media
47%
Science
26%
Formal & Business
9%
Less common in
Academia
5%
Wiki
4%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "this is the reason" is a versatile phrase used to introduce explanations or justifications across various contexts. Ludwig AI confirms its correctness and frequent use in written English. Predominantly found in News & Media and Scientific sources, the phrase offers a direct and clear way to connect a statement with its underlying rationale. When writing, ensure a clear context precedes its use to prevent ambiguity. Related phrases like "this is the cause" or "this is the motive" can provide nuanced alternatives depending on the specific meaning intended. Ludwig's analysis shows it is a very common phrase for a reason.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that's the reason
Changes "this is" to "that's", offering a more conversational tone while maintaining the same meaning.
this is the motive
Replaces 'reason' with 'motive', shifting the focus slightly to the underlying intention or drive.
this is the cause
Substitutes 'reason' with 'cause', highlighting a direct relationship between events.
this is the justification
Replaces 'reason' with 'justification', emphasizing the act of defending or explaining an action.
this is the ground
Uses 'ground' instead of 'reason', suggesting a basis or foundation for something.
this is the rationale
Substitutes 'reason' with 'rationale', highlighting a logical or coherent explanation.
this was the cause
Shifts the phrase to the past tense, indicating that the reason or cause occurred in the past.
this is one reason why
Adds 'one' and 'why', suggesting the possibility of other reasons existing.
such is the reason
Inverts the structure for a more formal or emphatic tone.
such was the reason
Combines the past tense with the inverted structure for a formal, past-oriented statement.
FAQs
How can I use "this is the reason" in a sentence?
You can use "this is the reason" to introduce an explanation or justification. For example, "I chose not to invest; "this is the reason": the risk was too high".
What phrases are similar in meaning to "this is the reason"?
Alternatives include phrases like "this is the cause", "this is the motive", or "this is the justification", depending on the specific nuance you want to convey.
Is it grammatically correct to say "this is the reason why"?
While "this is the reason" is grammatically sound, "this is the reason why" is also commonly used and generally acceptable. The addition of "why" emphasizes the explanatory nature of the statement.
What's the difference between "this is the reason" and "that's the reason"?
"This is the reason" is often used to introduce a more formal or direct explanation. "That's the reason" tends to be more conversational and can imply shared understanding or prior context.
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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested