The various uses of perfect aspect typically require a context to be interpreted, or even to be judged correct or not.  Part of the reason for the context-dependence of perfect aspect is that it tends to be used in background rather than foreground portions of a discourse, so in narrative it won't typically move the plot forward and in exposition or argument it won't be used to state major steps in the logic.

I'd have to see your sample sentence in a context to see whether it works or not.  There's nothing intrinsically wrong with the structure as it stands.  Rather, it requires further information to be fully interpretable.

Herb

From: Assembly for the Teaching of English Grammar [mailto:[log in to unmask]] On Behalf Of Cynthia Baird
Sent: 2009-03-04 21:48
To: [log in to unmask]
Subject: incorrect future perfect?

Would anyone care to comment on this sentence?  It came up in a literacy textbook I have to use, and a student had real difficulty with accepting this as a logical sentence.  I gave him my explanation about why I thought the sentence was problematic, but I would like to hear from some of you to know if I was right or wrong in my assessment of the sentence.

The sentence read as follows:

We will have finished the project tomorrow.

I know the sentence contains a future perfect, and I risk Brad's comments, but so be it.


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