Sentence examples for am not sure from inspiring English sources

The phrase "am not sure" is not correct in standard written English as it lacks a subject.
You can use it in informal contexts, but it should be preceded by a subject like "I" to be grammatically correct.
Example: "I am not sure if I can attend the meeting tomorrow."
Alternatives: "I'm uncertain" or "I have doubts."

Exact(55)

But I am not sure.

I am not sure why.

I am not sure that it does.

"Actually I am not sure," he said.

I am not sure why this happened.

"I am not sure about that".

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Similar(5)

A.I'm not sure.

She was not sure.

He's not sure.

He was not sure.

I was not sure.

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