I'm certain that the man committed a crime. THE MAN...
The man must have committed a crime.
It wasn't necessary to go to the immigration office. They already had my record. I...
I needn't have gone to the immigration office. They already had my record.
It's possible that Mary Anne broke the law when she entered the abandoned house. MARY ANNE...
Mary Anne might/may have broken the law when she entered the abandoned house.
I'm sure that she didn't feel any sympathy for him. SHE...
She can't have felt any sympathy for him.
It was not necessary for Henry to pay those taxes. His wife had already paid for them. HENRY...
Henry needn't have paid those taxes. His wife had already paid for them.
It was a very big mistake that the American citizens elected such a awful president. THE AMERICAN CITIZENS...
The American Citizens shouldn't have elected such a awful president.
It was wrong of George to get involved in the fight. GEORGE...
George shouldn't have got involved in the fight.
My granny wanted to donate her money to charity, but the burglar stole everything. MY GRANNY...
My granny would have donated her money to charity, but the burglar stole everything.
Mike was going to get involved in the campaign, but he preferred not to. MIKE...
Mike could have got involved in the campaign, but he preferred not to.
Anthony was going to take part in the celebration, but sadly he had to work. ANTHONY...
Anthony would have taken part in the celebration, but sadly he had to work.
Jeremy wanted to be the spokesperson of the meeting, but in the end they chose John. JEREMY...
Jeremy would have been the spokesperson of the meeting, but in the end they chose John.
The minister was able to fight for the rights of people, but he did nothing. THE MINISTER...
The minister could have fought for the rights of people, but he did nothing.
Perhaps your dad went to the demonstration. YOUR DAD...
Your dad might/may have gone to the demonstration.
It's possible that Winston volunteered in the animal shelter, but I'm not sure. WINSTON...
Winston may/might have volunteered in the animal shelter, but I'm not sure.
I'm certain Ginnifer didn't know about the living conditions of her daughter. GINNIFER...
Ginnifer can't have known about the living conditions of her daughter.
Danny wanted to raise money for the poor children, but he got ill and couldn't go to the event. DANNY...
Danny would have raised money for the poor children, but he got it and couldn't go to the event.
Kate was able to raise money for the neighborhood, but she decided not to. KATE...
Kate could have raised money for the neighborhood, but she decided not to.
The major wanted to pass a law against drugs, but eventually he decided not to pass it. THE MAJOR...
The major could have passed a law against drugs, but eventually he decided not to pass it.
I'm sure the citizens were really disappointed with the measure. THE CITIZENS...
The citizens must have been really disappointed with the measure.
I'm sure that the teacher rounded up the kids. THE TEACHER...
The teacher must have rounded up the kids.
I'm sure that the government took steps to end the poverty problem in the city. THE GOVERNMENT...
The government must have taken steps to end the poverty problem in the city.
It wasn't necessary for my mum to give the address to the foreigner. He found it himself. MY MUM...
My mum needn't have given the address to the foreigner. He found it himself.
It was wrong of the head teacher not to support the strike. THE HEAD TEACHER...
The head teacher should have supported the strike.
It was wrong of you to shout to that homeless. YOU...
You shouldn't have shouted to that homeless.
Maybe he was ill on Tuesday. HE...
He might/may have been ill on Tuesday.