Certainly vs Definitely mungo jerry

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

Certainly

Top 1,000 (very common)A2adverb

Definitely mungo jerry

InformalBeyond 10,000 (less common)
Most formal: CertainlyMost common: Certainly
 CertainlyDefinitely mungo jerry
Pronunciation🇬🇧 /["/ˈsɜːtnli/"]/🇺🇸 /["/ˈsɜːrtnli/"]/🇬🇧 //ˈdɛfɪnətli ˈmʌŋɡəʊ ˈdʒɛri//🇺🇸 //ˈdɛfɪnətli ˈmʌŋɡoʊ ˈdʒɛri//
MeaningDefinitely; for sure.A phrase used to express certainty, combined with a character name.
ExampleWithout treatment, she will **almost certainly** die.I definitely mungo jerry we will win this game!
RegisterNeutralInformal
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelA2-
Part of speechadverb
Collocationscertainly agree, certainly possible, certainly not, certainly true, certainly yesdefinitely not, definitely yes, definitely true
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.Using it in formal contexts where it seems out of place., Confusing 'mungo Jerry' with other phrases., Misunderstanding the playful tone implied.
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 'definitely mungo jerry' in casual conversations to emphasize certainty. It often refers to a playful tone, likely among friends.

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Certainly
Definitely mungo jerry

Frequently asked questions: Certainly vs Definitely mungo jerry

What's the difference between Certainly and Definitely mungo jerry?

Certainly: Definitely; for sure. Definitely mungo jerry: A phrase used to express certainty, combined with a character name.

Which is more formal: Certainly and Definitely mungo jerry?

Certainly is the most formal of these.

Which is more common: Certainly and Definitely mungo jerry?

Certainly is the most common in everyday English.

Can you show an example of each?

Certainly: Without treatment, she will **almost certainly** die. Definitely mungo jerry: I definitely mungo jerry we will win this game!

Can I use Certainly and Definitely mungo jerry interchangeably?

Not always. Certainly and Definitely mungo jerry 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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