Modal Verbs + have (should, could, must)

Should have se usa para:

• Possibility

• Suggestion

• Certainty

Could have se usa para:

• Certainty

• Suggestion

• Possibility

Must have se usa para:

• Suggestion

• Possibility

• Certainty

Complete the sentence:
You __________ (study) harder for the test. (suggestion)

• should have studied

• could have studied

• must have studied

Complete the sentence:
They __________ (arrive) by now; the train was on time. (certainty)

• should have arrived

• must have arrived

• could have arrived

Complete the sentence:
She __________ (call), but she didn't. (possibility)

• could have called

• must have called

• should have called

Complete the sentence:
I __________ (go) to the meeting yesterday. (suggestion)

• could have gone

• must have gone

• should have gone

Complete the sentence:
They __________ (forget) about the appointment. (certainty)

• should have forgotten

• could have forgotten

• must have forgotten

Complete the sentence:
We __________ (take) a taxi instead of walking. (possibility)

• must have taken

• could have taken

• should have taken

Complete the sentence:
You __________ (listen) to your teacher's advice. (suggestion)

• should have listened

• must have listened

• could have listened