Modal + Simple Form
Modal + "be" + participle
|I can speak English.
|I could speak English when I was 3.
|A piano can be tuned with a tuning fork.
|A piano could easily be tuned in 1850.
|Temperatures can fluctuate rapidly in October.
|It could have been cold yesterday.
|The politician can be bribed.
|He could have been bribed before he won the election.
|There may be an opening in French.
|There may have been a fire.
|She may be elected.
|He may have been caught by the police.
|The block and tackle might be unsafe
|There might have been a fire.
|He might be forgotten.
|He might have been caught by the police.
|Three unsafe conditions could exist.
|There could have been a fire.
|You could be arrested.
|He could have been prosecuted.
|You must like to study. You have spent all day in the library.
|There must have been a fire last night.
|The building must be ruined after the fire.
|The fire fighters must have been exhausted.
|Parents must provide for their children.
|Our parents must have provided for us.
|We must be notified.
|I have to study for this test.
|I had to study last night.
|The lab has to be cleaned.
|The police had to be notified.
|The list is to contain all the names.
|I was to go to the meeting.
|The box is to be filled.
|She was to be fired.
|You should work hard.
|You should have studied.
|The metal should be heated to 30 degrees.
|The glühwein should have been cooled.
|The class should begin soon.
|The bus should have arrived two hours ago.
|It should snow tomorrow.
|All citizens ought to vote.
|The government ought to have encouraged the workers to vote.
|The mixture ought to be heated for an hour.
|The vehicle ought to have been serviced by now.
|We will read chapter 5.
|I would have repaired the circuit but I was busy.
|Your orders will be followed to the letter.
|The plans would have been completed.
|The colonies would develop after 1650.
|The factory would have remained in operation.
|In that tractor the battery would be located near the starter.
|In the Roman Chariot, the brake would have been located near the railing.
|He is supposed to rectify the situation today.
|Jerry was supposed to deliver the goods last week.
|That job is supposed to be done today.
|The strawberry muffins were supposed to be baked by noon.
Other modal constructions:
|Joe used to play the accordion before he met Nancy.