Modals+and+modality

MODALS/MODALITY

Possibility and deduction: must, can’t, could, couldn’t, may, might, would + perfect infinitive. May + perfect

infinitive vs. might + perfect infinitive.

Obligation / Necessity / Advice: should, ought to, needn’t + perfect infinitive.

Revision of: had to, didn’t have to.

Be able to (different tenses).

Be likely/certain/unlikely, etc. to, certainly, possibly, etc: adjectives and adverbs to refer to different degrees of

certainty.