7. Could, may and might express possibility in the
present / future.
He / She might be his/her _____________
He / she could be his/her ______________
They may be his/her _________________
He / She could be their_________________
8. • Must is used for assumptions and deductions
based on evidence.
He must be her father.
She must be her grandmother.
The opposite of must is can’t.
He can’t be her father he’s too young.