Modals - in the future
100% probable in the future
He will (probably/certainly) do his homework
certain it happened in the past
He must have bought a car.
it's possible she's at work now
She may be working now
to be + sure
They're sure to be late.
likely
It's likely that he'll come.
80% probable in the future
She may well be here tomorrow
probably it happened in the past
it's not possible that they're cooking now
They can't be cooking now.
suppose NEG
I don't suppose (that) we'll go.
unlikely
It's unlikely that he's going to come
50% probable in the future
They may/might/could come to the party
perhaps it happened
We could have been arrested.
I'm certain she's going somewhere nice
She must be going somewhere nice
there + be + chance
There's a (good) chance that he will win.
certain
It's certain that he will come.
30% not probable in the future
He probably won't go to NY.
it definitely didn't happen
They can't have broken the window.
It's possible that he was trying to steal the money
He may have been trying to steal the money
there + be + chance NEG
There's no chance that he'll win.
possible + quite
It's quite possible that he will come.
0% probable in the future
She certainly/definitely won't pass the exam
certain it didn't happen
She can't have stolen the money!
I'm sure she was trying to call us
She must have been trying to call us
to be + bound
We are bound to find a cure for cancer one day.
unlikely with an adverb
It's highly unlikely that he will come.