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
all the sudden
Grammar usage guide and real-world examplesUSAGE SUMMARY
The correct phrase is "all of a sudden." You can use this phrase to refer to a sudden and unexpected occurrence.
For example: "All of a sudden, the lights began to flicker uncontrollably."
⚠ May contain grammatical issues
News & Media
Academia
Wiki
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
In science, if all the sudden "black" really does become "white", theories must be adjusted.
News & Media
Your post baby body is not all the sudden free for public commentary".
News & Media
Half of all the sudden deaths from the first heart attack showed the victims had normal levels of cholesterol.
Academia
"We don't need the great game, and then all the sudden it's a clunker the next week.
News & Media
Miranda Weese showed that she had mastered all the sudden tilts and shifts of direction in her pas de deux with Mr. Soto.
News & Media
Then all the sudden you're hawking every tattoo t-shirt out there.
News & Media
Then all the sudden, we're 100 people, and it felt like we were 100 people doing the work of 50 people.
News & Media
"A lot of people who lost a vehicle all the sudden can't get to work, can't afford to get a new car.
News & Media
"Imagine if all the sudden nobody was able to climb Mt. Everest ever again".
News & Media
'Imagine if all the sudden nobody was able to climb Mt. Everest ever again.'.
News & Media
Then all the sudden, you've got a violation on your hands just because people are expressing themselves".
News & Media
Expert writing Tips
Best practice
Always use the correct phrase "all of a sudden" to ensure grammatical accuracy and credibility in your writing.
Common error
Avoid omitting the "of" in "all of a sudden". While "all the sudden" is a common mistake, it's grammatically incorrect and can detract from the clarity and professionalism of your writing.
Source & Trust
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "all the sudden" functions as an adverbial phrase, attempting to modify a verb and indicate a sudden or unexpected occurrence. However, this is a grammatically incorrect usage, as highlighted by Ludwig AI.
Frequent in
News & Media
49%
Academia
20%
Wiki
6%
Less common in
Formal & Business
0%
Science
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, while the phrase "all the sudden" appears frequently across various sources, especially in News & Media and Academia, it's crucial to recognize that it is a grammatically incorrect form of "all of a sudden". As Ludwig AI confirms, the correct phrase includes the preposition "of". Therefore, to maintain clarity and credibility in your writing, always use "all of a sudden" or consider alternatives like "suddenly" or "unexpectedly".
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
suddenly
A single-word adverb replacing the multi-word phrase for brevity.
unexpectedly
Focuses on the lack of anticipation rather than the speed of the event.
all at once
Emphasizes simultaneity and the lack of warning.
out of the blue
Highlights the complete lack of predictability.
in an instant
Conveys the speed and immediacy of the occurrence.
without warning
Focuses on the absence of any preceding indication.
in a flash
Emphasizes the rapidity and brevity of the event.
on the spur of the moment
Highlights the lack of planning or forethought.
forthwith
A more formal and archaic term for immediate action.
immediately
Similar to 'suddenly' but can also imply a direct reaction to a stimulus.
FAQs
What is the correct way to say "all the sudden"?
The correct phrase is "all of a sudden", with the preposition "of" included.
Is "all the sudden" grammatically correct?
No, "all the sudden" is grammatically incorrect. The correct and accepted form is "all of a sudden".
What can I say instead of "all the sudden"?
You should use the correct phrase "all of a sudden". If you're looking for alternatives, consider using "suddenly", "unexpectedly", or "out of the blue", depending on the context.
What's the difference between "all the sudden" and "all of a sudden"?
"All the sudden" is a misspelling. "All of a sudden" is the correct and widely accepted idiom to describe something happening quickly and unexpectedly.
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
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested