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Hello everyone!

I just would like to know how commonly future perfect is used to indicate assumption. I mean if I say "Of course you will have met Sally at Mark's birthday party.", is it a natural way of saying " I assume you've met Sally at Mark's birthday party." ?

Thanks a lot in advanceEmotion: smile
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Hi,

I just would like to know how commonly future perfect is used to indicate assumption. I mean if I say "Of course you will have met Sally at Mark's birthday party.", is it a natural way of saying " I assume you've met Sally at Mark's birthday party." ?

Yes, this is not uncommon. I'd suggest that you think of it more as 'logical deduction'. The speaker is saying that an action has already happened which has an impact on a present/future situation. Here are a couple more examples.

He will have left by now (so don't call him at his office).

He won't have left yet (so call him at his office).

What your example means is "Of course you will have met Sally at Mark's birthday party (so I won't introduce you to her again)."

Best wishes, Clive
Comments  
Hello.

I think "You will have met ... party." sounds odd.

"You will have finished this work by tommorow." sounds natural to me.

I hope other people will give you better comments. See you!
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Hey Kenta! Thanks a lot for your help [F]...yep, it doesn't sound very natural to my foreign ears as well, but I believe I've heard "future perfect" being used like that Emotion: thinking

Anybody else has a take on this issue? Pleaassssssseeee Emotion: big smile
 Clive's reply was promoted to an answer.
Muchas Gracias Clive!!![F] That helps very much!

Best wishes to you as well,

Hena
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I have a problem to do an excecise of my homework
It is about using all contracted forms of "will" there 2 in special that i can' t do. It's about a conversation between 2 colleagues. They are talking about "Toby" what he's doing or what he has done. In the conversation colleagues Says:
Elaine: Yesterday, i suppose he gave his presentation and today he's doing as much as networking as he can".
I have to respond this:
Yesterday, ____________his presentation.
Today,_______________as much networking as he can.

Any idea of how can this be solved? The answers has to responded talking only about Toby "he'll" and only contracted forms of will.
Thankyou