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 that since
Grammar usage guide and real-world examplesUSAGE SUMMARY
"is that since" is correct and usable in written English.
You can use it to refer to a time frame or to introduce a comparison. For example: "Is that since the project started, there have been numerous delays?".
✓ 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
60 human-written examples
The truth is that, since 2001, in-your-face racism has returned.
News & Media
The most important one is that since the accident he never switches seats with anyone.
News & Media
The only thing new is that since December, these groups are not visible.
News & Media
"Of concern for Australia is that since mid-2000, the gender pay gap has increased significantly".
News & Media
"The good news is that since we don't get much state money.
News & Media
Of note is that since the programming is donated, it has no commercials.
News & Media
One problem is that since the start, he's been trying to outrun nature.
News & Media
Their central finding is that since the early 20th century, fog frequency in summers has declined by about one-third.
News & Media
The formal reason is that since the investigation began in Kutaisi, the trial should take place there too.
News & Media
Mr Perry's best selling point is that, since June 2009, Texas has created 40% of America's net new jobs.
News & Media
Cook's central contention is that since the military coup of 1952, Egypt's leaders have never had an ideology.
News & Media
Expert writing Tips
Best practice
When using "is that since", ensure the clause following "since" provides a clear and direct reason or explanation for the statement preceding it.
Common error
Avoid using "is that since" when the "since" clause describes a time frame rather than a cause. In temporal contexts, consider using "after" or "following" instead.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is that since" functions as a causal conjunction, linking a statement or situation with its explanation or cause. It introduces a subordinate clause explaining why something is the case. As confirmed by Ludwig AI, this usage is grammatically correct and effectively communicates a cause-and-effect relationship.
Frequent in
News & Media
65%
Science
20%
Formal & Business
15%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "is that since" serves as a versatile causal conjunction, effectively linking events and explanations. It is widely used across various domains, including news, science, and business, as confirmed by Ludwig AI. While grammatically correct, careful consideration should be given to the context to ensure the "since" clause provides a direct causal link rather than simply indicating time. Alternatives like "because", "given that", and "considering that" can offer nuanced variations for expressing causality. "Is that since" is a valuable tool for clear and logical communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
because
Provides a straightforward causal explanation.
as
Similar to because, but can also imply a simultaneous action.
given that
Focuses on the premise or condition leading to a conclusion.
considering that
Highlights the act of taking something into account.
due to the fact that
Emphasizes the cause as a reason for something.
in light of the fact that
Emphasizes the informative aspect of the reason.
for the reason that
Similar to "because", but slightly more formal.
seeing as
Offers a more informal alternative to indicate the reason.
on the grounds that
Suggests a justification or basis for an action or belief.
inasmuch as
A more formal way of saying "since" or "because".
FAQs
How can I correctly use "is that since" in a sentence?
Use "is that since" to introduce a clause that explains the reason for something. For instance, "The problem "is that since" the beginning of the credit crunch the Banks have not been lending."
What are some alternatives to "is that since"?
You can use phrases like "given that", "considering that", or simply "because" to convey a similar meaning.
Is it more formal to use "is that since" or just "since"?
The phrase "is that since" doesn't necessarily add formality. The choice depends on the overall tone and structure of your sentence. Sometimes, "since" alone is sufficient and more concise.
What is the difference between "is that since" and "due to the fact that"?
While both express causality, "due to the fact that" is generally considered more formal and emphasizes the factual basis of the cause. "Is that since" can be used in a broader range of contexts.
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