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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
the key thing is
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the key thing is" is correct and usable in written English.
It can be used to emphasize the most important point or aspect of a discussion or argument. Example: "When considering the benefits of exercise, the key thing is to find an activity you enjoy."
✓ Grammatically correct
News & Media
Alternative expressions(20)
the main thing is
the most important thing is
the crucial point is
the essential element is
what matters most is
the primary concern is
above all else
the bottom line is
the critical factor is
the main point is
the crucial aspect is
what is required
all that is outweighed
all that s needed
all that are necessary
all that is suitable
everything which is needed
that's sufficient
the offer stands
the fact stands
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
58 human-written examples
"The key thing is persistence.
News & Media
The key thing is its simplicity.
News & Media
The key thing is he's in.
News & Media
The key thing is leadership potential.
News & Media
The key thing is to stay there".
News & Media
The key thing is that it's funny".
News & Media
The key thing is to learn from those experiences".
News & Media
The key thing is you keep challenging and developing it.
News & Media
The key thing is to stay off Twitter.
News & Media
The key thing is capital, a top official told me.
News & Media
"The key thing is that he makes vital saves.
News & Media
Expert writing Tips
Best practice
When using "the key thing is", ensure that the subsequent statement is concise and directly relevant to the context. Avoid burying the key point within additional details.
Common error
Avoid starting multiple consecutive sentences with "the key thing is". This can make your writing sound repetitive and monotonous. Vary your sentence structure by using alternatives like "most importantly" or "the crucial point is".
Source & Trust
87%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the key thing is" functions as a transitional phrase to introduce the most important aspect, element, or factor in a particular situation or discussion. As Ludwig AI shows, this phrase is used across numerous contexts to highlight the central idea.
Frequent in
News & Media
80%
Formal & Business
10%
Science
5%
Less common in
Encyclopedias
2%
Wiki
2%
Reference
1%
Ludwig's WRAP-UP
In summary, "the key thing is" is a versatile phrase used to emphasize the most important aspect of a topic. As Ludwig AI confirms, this phrase is grammatically correct and widely used across various contexts, particularly in News & Media. When using "the key thing is", make sure to follow it with a concise and relevant statement to keep your audience engaged. Although highly versatile, avoid overuse by incorporating synonyms such as "the main thing is" and "the most important thing is".
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
the most important thing is
Replaces "key" with "most important", directly emphasizing the significance.
the main thing is
Uses "main" instead of "key", indicating the primary focus.
the crucial point is
Substitutes "key thing" with "crucial point", highlighting the decisive element.
the essential element is
Replaces "key thing" with "essential element", underscoring the fundamental component.
what matters most is
Shifts the focus to what is of greatest importance.
the primary concern is
Emphasizes the main worry or focus of attention.
the fundamental aspect is
Highlights the foundational nature of the aspect being considered.
above all else
Indicates that something is more important than anything else.
the bottom line is
Uses a business idiom to indicate the most important consideration.
the critical factor is
Stresses that the following aspect is a decisive element.
FAQs
How can I use "the key thing is" in a sentence?
Use "the key thing is" to emphasize the most important aspect or point in a discussion. For example, "When learning a new language, "the key thing is" consistent practice".
What are some alternatives to "the key thing is"?
You can use alternatives such as "the main thing is", "the most important thing is", or "the crucial point is" to convey a similar meaning.
Is it grammatically correct to say "the key thing is"?
Yes, it is grammatically correct and widely accepted in English. It is commonly used to highlight the most significant element in a given situation.
What is the difference between ""the key thing is"" and "the most important thing is"?
While both phrases are very similar, ""the key thing is"" can sometimes imply a specific element or action that unlocks success, whereas "the most important thing is" simply emphasizes overall significance. They are often interchangeable depending on context.
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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
4.6/5
Expert rating
Real-world application tested