Share Expressing possibility and guessing (the past)
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She (must forget / must have forgotten) her umbrella because it’s still in the office.
must have forgotten
He (may lose / may have lost) his phone; he’s been looking for it all day.
may have lost
The lights were off; they (must have gone / must gone) out.
must have gone
She (must have missed / may not have missed) the train because she arrived late.
must have missed
You (must not have locked / could have locked) the door because it’s open now.
must not have locked
The keys are not here. You (may have left / must leave) them in the car.
may have left
She looks tired; she (must work / must have worked) late last night.
must have worked
He (may have forgotten / could not have forgotten) to call; he always remembers.
could not have forgotten
The package (must have arrived / might not have arrived) earlier because it’s on the table now.
must have arrived
He (must not have finished / may have finished) his homework because it’s still on the table.
must not have finished
the window. / might have / The cat / jumped / out of
The cat might have jumped out of the window.
He must / his keys / have forgotten / at home.
He must have forgotten his keys at home.
so quickly. / could not have finished / She / the project
She could not have finished the project so quickly.
the alarm / You / might not have heard / this morning.
You might not have heard the alarm this morning.
too hot. / could have burned / because / The cake / the oven was
The cake could have burned because the oven was too hot.
You / your wallet / could have forgotten / in the car.
You could have forgotten your wallet in the car.
