Phrases Expressions of Certainty and Uncertainty

I'm sure.

A2

Meaning

I am certain.

Examples

  • John: 'Do you think it will rain?'
  • Alice: '<b>I'm sure</b>. The sky is very dark.'
  • John: '<b>I'm sure</b>. I've already left.'
  • Alice: 'Will you be on time?'
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