Already. Could you check the explanation?

Hi teachers,
An affirmative sentence in the present perfect with the indefinite adverb of time already can express:
a) actions that have occurred before now.
b) surprise that actions have occurred sooner (earlier) than expected.
Grammar Tip
The tone of voice is also very important in distinguishing which definition the speaker intends.
Paraphrases for already: before now; before this time; previously.

(Mr. White is the boss.)
Examples:
Peter: Mr. White, I have already finished my reports.
Peter: Mr. White, I have before now finished my reports.

Mr. White: You have finished your reports already! Let me check that. I can't believe it.
Mr. White: You have finished your reports sooner (earlier) that expected! Let me check that. I can't believe it.
Or should it be only in a question to show the above meaning?
Mr. White: Have you already finished your reports? Let me check that. I can't believe it.

Thanks in advance.