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WHAT CAN MODAL VERBS OF PROBABILITY EXPRESS? OR BEEN USED FOR?
MUST
CAN'T
We don't have all the facts so we're not absolutely sure, but we're pretty certain.
May/Might/Could
express probability in present or future
+Negative (couldn't is not so common)
Continous infinitive is formed with BE + ING.
Asking
Probability in past
Perfect infinitive
How to express degrees of posibility in past
continuous infinitive
