I will/would have finished my work by tomorrow 6 PM.

[tufguy]

1) I will have finished my work by tomorrow 6 PM. (I am sure that I will be able to complete it by then)

2) I would have finished my work by tomorrow 6 PM. (I am not sure that I will be able to complete it by then so is it correct to use "would" here instead of "will"?)

 

[emsr2d2]

2 is not right. If you're not sure that you'll be able to complete it by then, say "I might finish my work by ...".

 

[Yankee]

#1 Indicates a definite time for completion.
#2 Suggests that some condition exists/existed that prevented or delayed completion by 6 PM.

 

[Tarheel]

Tufguy, you see m to look for reasons to make your sentences more complicated that they need to be. Perhaps:

I expect to finish tomorrow by 6.

Or:

I will finish tomorrow by 6.

I am assuming both parties to the conversation know they are talking about work.

 

[tufguy]

2 is not right. If you're not sure that you'll be able to complete it by then, say "I might finish my work by ...".

So in any case "would have done" cannot be used for future. Am I correct?

 

[Tarheel]

So in any case "would have done" cannot be used for future. Am I correct?

I am pretty sure I have not used "will have been done" in ny whole life. You probably don't need it either.