1. He must be the richest man in the world.
He can’t live in a small house.
He may live in a huge mansion.

2. modals of deduction A- He might / could be South American.
Look at these sentences and answer the questions:
A- He might / could be South American.
B - They must be travelling round Europe.
C - She can’t be his wife.She’s too young
Which verb means it’s impossible?
Which verbs mean it’s possible?
Which verb means I’m sure it’s true?

3. Modals of deduction (present time)
They must be out. There aren’t any lights on.
She must have a lot of money. She drives a Porsche.
His phone’s switched off. He might be on the plane now.
She’s not at home. She may be working.
He can’t be ill. I saw him at the gym today.
They can’t be Italian. They’re speaking to each other in Spanish.
We are certain that something is true  _______
We are certain that something is impossible ______________
We are uncertain about something  __________/___________
Read the examples and complete the rules:
MUST
CAN’T (CANNOT)
MAY (NOT)
MIGHT (NOT)

4. Complete the following sentences with one correct modal verb of deduction:
It _____ be true! I saw it on the news.
He _____ be away. His car is outside his house.
She looks very young. She _____ be more than 16.
-What music is this? – I’m not sure. It __________ be Mozart.
They _____ have a lot of money. Their house is enormous.
I ______ be a size 44! I’m usually a 40 or 42.
I’m not sure why she hasn’t phoned me.
She _______________ have my new number.
He can’t be serious. He _____ be joking.
He _____ be a good footballer. He’s not fit enough.
He __________ like this book. He’s interested in history.
He ____________ remember me. He hasn’t seen me for ages.
He _______ be over 70. He retired 10 years ago.
must
can’t
can’t
might / may
must
can’t
mightn’t / may not
must
can’t
might / may
mightn’t / may not
must