2021-11-24 11:00:28
#Modalverbs.
ProbabilityPRESENT:
They will be home soon. (100% certain; prediction) //
Greg should win easily. (90% certain; future only; he'll win easily.) //
They ought to be home by now. (90% certain; they will probably be home.)
PAST: He should have received his prize by now. (He has probably received it by now.) //
They ought to have arrived an hour ago. (They have probably arrived.)
Logical assumption PRESENT: She must be working. (90% certain - positive; I'm sure she's working.) //
She can't be over forty. (negative; I'm sure she isn't over forty.) //
He couldn't be at work. (negative; I don't think he's at work.)
PAST: She must have been working. (positive; I'm sure she was working.) //
She can't have stolen the money. (negative; I'm sure she didn't steal the money.) //
He couldn't have been at work yesterday. (negative; I don't think he was at work yesterday.)
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