But it did vs Certainly vs That's true

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

But it did

Top 3,000 (common)

Certainly

Top 1,000 (very common)A2adverb

That's true

Top 2,000 (common)
Most common: Certainly
 But it didCertainlyThat's true
Pronunciation🇬🇧 //bət ɪt dɪd//🇺🇸 //bət ɪt dɪd//🇬🇧 /["/ˈsɜːtnli/"]/🇺🇸 /["/ˈsɜːrtnli/"]/🇬🇧 //ðæts truː//🇺🇸 //ðæts tru//
MeaningA phrase used to say something happened or was true.Definitely; for sure.It is correct.
ExampleI thought he would lose, but it did.Without treatment, she will **almost certainly** die.She really loves painting, and that's true.
RegisterNeutralNeutralNeutral
How commonTop 3,000 (common)Top 1,000 (very common)Top 2,000 (common)
CEFR level-A2-
Part of speechadverb
Collocationsmake a point, address a concern, prove a factcertainly agree, certainly possible, certainly not, certainly true, certainly yesthat's true for, that's true about, that's true in
Antonyms-uncertainly, doubtfullythat's false, that's incorrect
Common mistakesUsing without context, leading to confusion., Omitting it and using just 'did' may change meaning., Misplacing in a sentence can affect clarity.'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 'that's truth' instead of 'that's true'., Confusing with 'that's truthfully'., Overusing in formal writing.
Usage notesCommonly used in conversations or responses to emphasize a point. It’s appropriate in both informal and formal contexts.Use '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.Used to agree with a statement. Avoid in overly formal contexts; prefer 'that is correct' instead.

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But it did
Certainly
That's true

Frequently asked questions: But it did vs Certainly vs That's true

What's the difference between But it did, Certainly, and That's true?

But it did: A phrase used to say something happened or was true. Certainly: Definitely; for sure. That's true: It is correct.

Which is more common: But it did, Certainly, and That's true?

Certainly is the most common in everyday English.

Can you show an example of each?

But it did: I thought he would lose, but it did. Certainly: Without treatment, she will **almost certainly** die. That's true: She really loves painting, and that's true.

Can I use But it did, Certainly, and That's true interchangeably?

Not always. But it did, Certainly, and That's true 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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