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not sure if I understand vs not sure if I understood

Both phrases are correct, but they are used in different contexts. 'Not sure if I understand' is used when someone is currently unsure about their understanding of something, while 'Not sure if I understood' is used when someone is unsure if they understood something in the past.

Last updated: March 25, 2024 • 1104 views

not sure if I understand

This phrase is correct and commonly used in English.

This phrase is used when someone is currently unsure about their understanding of something.
  • I'm not sure if I understand.
  • - Not sure if I understand.
  • I'm not sure if I understand...
  • I'm not sure if you understand the severity of your condition.
  • We don't know for sure if they really understand the function of the whistles.
  • Yes. I'm sure Ricky would understand if I change my mind.
  • I'm sure Maya will understand if I'm not here when she wakes up.
  • I'm sure you'll understand if I seem far from happy.
  • I'm sure you will understand if I insist on the utmost confidentiality
  • I am sure he will understand if I concentrate the rest of my remarks on the revenue side of the budget.
  • But I am sure they will understand if I concentrate today on my own report because, among other reasons, it is not often that we have reports relating to the fish product processing industry.
  • I am sure he will understand if I say to him that I welcome him more than I welcome his message.
  • Finally, Mr President, I hope you will forgive and I am sure you will understand if I end on a personal note: this is the last time I shall attend a debate in the European Parliament as the representative of the Portuguese Presidency.
  • I'm sure Louis would understand if you're a little late.
  • I'm sure they'll understand if you don't feel up to it.
  • I'm sure they would understand if you don't go in to work today.
  • So I'm sure you can understand if we're not thrilled about the Chief forcing another one down our throat.
  • However, you will, I am sure, understand if we look at the more critical points today, where we want to see more being done.
  • Not sure if I like it.
  • I'm not sure if I'm prepared for that.

not sure if I understood

This phrase is correct and commonly used in English.

This phrase is used when someone is unsure if they understood something in the past.
  • Not sure if I like it.
  • I'm not sure if I'm prepared for that.
  • I'm not sure if I can...
  • I'm not sure if I understand.
  • I'm not sure if I fixed the navigational glitch.
  • I'm not sure if I can save my estate.
  • Not sure if I can help you, detective.
  • Not sure if I can help you either.
  • I'm not sure if I have any.
  • Not sure if I can find it.
  • I'm not sure if I have the time.
  • I'm not sure if I should.
  • I'm not sure if I can really make that few thousand.
  • I'm not sure if I've done anything wrong with Will.
  • But I'm not sure if I can.
  • - Not sure if I understand.
  • Not sure if I even I continue to live.
  • I'm not sure if I can work here anymore.
  • I'm not sure if I understand...
  • I'm not sure if I'd be great company.

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