If the weather had been fine, we would have gone out.

[tufguy]

"He may have reached here by the end of the day" .

That is possible. I have never said that it isn't.

(I am more likely to say "He may have got here/arrived" or "he may get here/arrive", but that is not important.)

Thank you but "Would have done" cannot be used in the same way, right? And how about "Might have done" is it also incorrect?

 

[Matthew Wai]

I think 'might have done' can refer to the future.

 

[tufguy]

"He may have reached here by the end of the day" .

That is possible. I have never said that it isn't.

(I am more likely to say "He may have got here/arrived" or "he may get here/arrive", but that is not important.)

No, it is important for me to know what you won't say. Please don't get annoyed. I was just asking you that what would you say instead of "Will have done" if you are not sure about the thing that is going to happen in the future. And that "Would have done" article also confused me.