not sure if I understand correctly vs not sure if I understood correctly

Both phrases are correct, but they are used in slightly different contexts. 'Not sure if I understand correctly' is used when expressing uncertainty about one's current understanding, while 'Not sure if I understood correctly' is used when questioning a past understanding. The choice between them depends on the timing of the uncertainty.

Last updated: March 25, 2024

not sure if I understand correctly

This phrase is correct and commonly used when expressing uncertainty about one's current understanding.

This phrase is used to convey doubt about one's comprehension at the present moment.

Alternatives:

I'm not sure if I understand correctly
I'm unsure if I understand correctly

not sure if I understood correctly

This phrase is correct and commonly used when questioning a past understanding.

This phrase is used to express uncertainty about whether one correctly understood something in the past.

Alternatives:

I'm not sure if I understood correctly
I'm unsure if I understood correctly

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not sure if I understand correctly vs not sure if I understood correctly