Certainly vs Gonna be definitely likely

When to use each in English, with meaning, register, and examples.

Certainly

Top 1,000 (very common)A2adverb

Gonna be definitely likely

InformalTop 2,000 (common)
Most formal: CertainlyMost common: Certainly
 CertainlyGonna be definitely likely
Pronunciation🇬🇧 /["/ˈsɜːtnli/"]/🇺🇸 /["/ˈsɜːrtnli/"]/🇬🇧 //ˈɡʌnə biː ˈdɛfɪnətli ˈlaɪkli//🇺🇸 //ˈɡʌnə bi ˈdɛfɪnətli ˈlaɪkli//
MeaningDefinitely; for sure.Going to happen for sure
ExampleWithout treatment, she will **almost certainly** die.It's gonna be definitely likely that we'll win the game this weekend.
RegisterNeutralInformal
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelA2-
Part of speechadverb
Collocationscertainly agree, certainly possible, certainly not, certainly true, certainly yesgonna be sure, gonna happen, gonna be certain, gonna be okay, gonna be fun
Antonymsuncertainly, doubtfully-
Common mistakes'Certainly' is often incorrectly used in place of 'certain' in adjectives., Learners might confuse 'certainly' with 'definitely' without noticing the subtle nuance., Some learners use 'certainly' in inappropriate contexts, such as casual greetings.Confusing with 'going to' - 'gonna' is informal., Using 'definitely likely' with different contexts where certainty isn't needed., Overusing in formal settings, which can sound unprofessional.
Usage notesUse 'certainly' when you want to emphasize affirmation or agreement. It is more formal than 'sure' and works well in professional settings, but might feel too strong in casual conversations.Use 'gonna be definitely likely' in casual conversations to express certainty about a future event. It's best avoided in formal writing.

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Certainly
Gonna be definitely likely

Frequently asked questions: Certainly vs Gonna be definitely likely

What's the difference between Certainly and Gonna be definitely likely?

Certainly: Definitely; for sure. Gonna be definitely likely: Going to happen for sure

Which is more formal: Certainly and Gonna be definitely likely?

Certainly is the most formal of these.

Which is more common: Certainly and Gonna be definitely likely?

Certainly is the most common in everyday English.

Can you show an example of each?

Certainly: Without treatment, she will **almost certainly** die. Gonna be definitely likely: It's gonna be definitely likely that we'll win the game this weekend.

Can I use Certainly and Gonna be definitely likely interchangeably?

Not always. Certainly and Gonna be definitely likely are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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