let me know if you didn't vs let me know if you don't

Both phrases are correct, but they are used in different contexts. 'Let me know if you didn't' is used when referring to a past action that may or may not have been completed, while 'Let me know if you don't' is used when referring to a future action that has not yet occurred.

Last updated: March 25, 2024 • 5501 views

let me know if you didn't

This phrase is correct and commonly used when referring to a past action that may or may not have been completed.

This phrase is used to ask someone to inform you if they did not do something in the past. It implies that the action could have been done, but you are unsure.

Examples:

Let me know if you didn't receive the email I sent yesterday.
Please let me know if you didn't finish the report as planned.

Show examples from the web [+]

Let me know if you find any organics on that tape.
Just let me know if you have any premonitions.
Let me know if you trace the source.
Let me know if you need repairs for accidents or have any problems.
Let me know if you find any suspicious oil slicks.
So, let me know if you want to tap this.
- Let me know if you see any.
Well, you let me know if you need anything.
Let me know if you're ready to make a change.
Let me know if you want to do some more campus registrations.
Admiral, let me know if you hear from Rex.
Let me know if you hear anything more about the identification.
Let me know if you have any thoughts.
So, let me know if you have any other observations on weather patterns.
Okay, let me know if you need anything.
Let me know if you find anything.
- Let me know if you need anything.
Let me know if you need...
Let me know if you want some liquor in that cola.
Let me know if you need a translator.

Alternatives:

Let me know if you haven't
Let me know if you failed to
Let me know if you neglected to
Let me know if you missed

let me know if you don't

This phrase is correct and commonly used when referring to a future action that has not yet occurred.

This phrase is used to ask someone to inform you if they do not do something in the future. It implies that the action has not happened yet.

Examples:

Let me know if you don't finish the project on time.
Please let me know if you don't attend the meeting tomorrow.

Show examples from the web [+]

If you want anything, just ask for it, and let me know if you don't get it.
I assume you still want me in Monte Carlo for the next phase of the trial and that you will let me know if you don't.
Just let me know by tonight if you don't find him.
Let me know if you find any organics on that tape.
Just let me know if you have any premonitions.
Let me know if you trace the source.
Let me know if you need repairs for accidents or have any problems.
Let me know if you find any suspicious oil slicks.
So, let me know if you want to tap this.
- Let me know if you see any.
Well, you let me know if you need anything.
Let me know if you're ready to make a change.
Let me know if you want to do some more campus registrations.
Admiral, let me know if you hear from Rex.
Let me know if you hear anything more about the identification.
Let me know if you have any thoughts.
So, let me know if you have any other observations on weather patterns.
Okay, let me know if you need anything.
Let me know if you find anything.
- Let me know if you need anything.

Alternatives:

Let me know if you fail to
Let me know if you neglect to
Let me know if you miss
Let me know if you don't manage to

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let me know if you didn't vs let me know if you don't