English phrase from drama scenes

What Does "i'm not sure" Mean?

Learn what "i'm not sure" means, when people say it, and how to use it naturally in English.

Intermediate
Neutral
Express Doubt
English Phrases for Work

I'm not sure I know who it could be.

This means the speaker is uncertain about the person being discussed.

From Tied By Fate, Episode 27

When do people say this?

Scene Context

The speaker is unsure who someone could be referring to.

Usage Scenario

Use this when you are guessing or honestly unsure who someone means. It can sound hesitant or defensive depending on tone.

Better ways to say it

1
I’m not sure who it could be.
2
I don’t know who it could be.
3
I’m not sure who you mean.

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English Phrases for Work

What Does "i'm not sure" Mean? - ReelFluent