How do you say let me know when you are done?

That’s a fine statement. You can also use present tense for the task: “Please let me know when you’re finished” or “Please let me know when you finish the job (task).” I like “finish” a little better than “done,” but “done” is also correct.

Have you finished or had you finished?

‘ Did you finish? is just past. You’re asking about an activity that happened before but not necessarily has relevance to the present. Have you finished? is just asking for the state of the action that has just completed or you at least it expect it to be soon.

Is Finished correct grammar?

The past participle (“finished”) here either functions as an adjective that modifies the noun “action” in this sentence or it is part of the verb. The former feels right to me, but either way, “finished” is correct. The correct form is the past participle “finished”.

Have you finished your work which sentence?

The correct sentence is “Have you finished your work?” “Did you finish your work?” The first correct sentence represents the use of Present Perfect Tense. The second correct sentence represents the use of Past Tense.

Will update once done?

“I will update you, once it’s done.” – It is not a past event and we do not know the exact moment in time that the event will occur. So we us (when) in place of (once). When implies some uncertainty to the moment in time but does not weaken the sentence at all.

What is the difference between have finished and had finished?

“Had” is used here because it is past perfect. I have finished the work. I.e. the work has been finished without mentioning any timeline.

Has finished or is finished?

You say, “The meeting has finished.” ‘The meeting is finished’ finished is used as an adjective. ‘The meeting has finished’ finished is the past participle of a verb in the present perfect tense.

Can I say I have finished?

The verb to finish can be used with the auxiliary ‘to have’ or ‘to be’: ‘I have finished’ (the auxiliary verb ‘have’) as well as I am finished (auxiliary verb to be) (predominantly American). Both have the same meaning. I am finished with the work you gave me. I have finished, I have completed the work you gave me.

Who would finish the work that needs to be finished?

Explanation: the 0ne who is knowledgable will finish the work that needs to be finished.