Cool MateMeaning of I don't know
A phrase used to express uncertainty or lack of knowledge.
In simple words: I am not sure.
I don't know in a sentence
- What time is the meeting? I don't know.
- Can you give me an answer? I don't know.
- If you ask me where John is, I don't know.
How to use I don't know
Use in conversations when unsure about an answer. Avoid in formal situations where providing a response is expected.
Grammar pattern
standalone phrase
Memory hint
Think of a puzzled person scratching their head — they use 'I don't know'.
Related words
Collocations with I don't know
- I don't know what
- I don't know why
- I don't know how
Synonyms for I don't know
- I have no idea
- I'm not sure
- I can't say
Opposites of I don't know
- I know
- I am sure
- I understand
Common mistakes with I don't know
- Using it too formally in professional settings.
- Saying 'I not know' instead of 'I don't know'.
- Confusing it with 'I don't know how'.
I don't know appears in
I don't know in other languages
More chunks like I don't know
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A way to show appreciation to someone.
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It means you are able to do something.
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Frequently asked questions about "I don't know"
What does "I don't know" mean?
I am not sure.
What is the definition of "I don't know"?
A phrase used to express uncertainty or lack of knowledge.
How do you use "I don't know" in a sentence?
What time is the meeting? I don't know.
Can you give another example of "I don't know"?
Can you give me an answer? I don't know.
What are synonyms for "I don't know"?
Common alternatives include I have no idea, I'm not sure, I can't say.
What is the opposite of "I don't know"?
Opposite meanings include I know, I am sure, I understand.
What words go with "I don't know"?
It commonly pairs with I don't know what, I don't know why, I don't know how.
What are common mistakes when using "I don't know"?
Using it too formally in professional settings. Saying 'I not know' instead of 'I don't know'. Confusing it with 'I don't know how'.
How do you pronounce "I don't know"?
US: //aɪ doʊnt noʊ//, UK: //aɪ dəʊnt nəʊ//. Listen to the audio above to hear native pronunciation.
When should I use "I don't know"?
Use in conversations when unsure about an answer. Avoid in formal situations where providing a response is expected.