Is it necessary for me to come to the barbecue? (have)
Do I have to come to the barbecue?
It's possible that Ben won't want to come with us.
Ben may not come with us.
Paul doesn't like cats. (pet cat)
He can’t have a pet cat.
There is a possibility that I'll go round to Kathy's house tonight.
I might go to Kathy's house tonight.
Martha is a really careless driver. I know. She should start being more careful. (could)
She could have a serious accident some day.
I have to iron this dress because I can't wear it to work like that. (needs)
This dress needs ironing.
You are not allowed to chew gum in class.
You mustn’t chew gum in class.
I got Justin Timberlake's new CD for Chris. I don't think that Chris listens to that kind of music. (might)
Chris might not like it.
Kate has just had dinner. (hungry)
She can’t be hungry.
Letting your sister use the knife is a bad idea. (could)
She could cut herself.
It isn't necessary for us to go back home, but we will anyway.
We don’t have to go back home, but we will anyway.
George didn't come to work today and yesterday he wasn't feeling very well. (must)
George must be ill.
his is the third time this week that Mary's ordering Chinese.
She must love Chinese food.
It is certain that Tony knows about the concert.
Tony must know about the concert.