The document discusses ways to express possibility and make deductions in English using modal verbs. It provides examples of how to use may/might, could have, must, can't, must have, and couldn't have to talk about what is possible, impossible, or likely to have occurred in the present, past or future. It also includes a short quiz to check understanding of using these modal verbs in different contexts.

2. EXPRESSING POSSIBILITY
1. MAY/MIGHT + VERB: Something is possible to occur now or in the future.
 We may/might go to the party, but I’m not sure yet.
2. MAY/MIGHT + HAVE + PAST PARTICIPLE: Something is possible to occur in the
past.
 She is crying. She may/might have received bad news.
3. COULD + HAVE + PAST PARTICIPLE: Something was possible to occur but it didn’t.
 He could have called when the meeting finished.

3. MAKING DEDUCTIONS
1. MUST + VERB : We are almost sure that something is true.
 This singer must be better than the other one.
2. CAN’T + VERB : We believe that something is impossible.
 He can’t be Andres. He isn’t blond!
3. MUST + HAVE + PAST PARTICIPLE: We are almost sure that something
happened in the past.
 My son is dirty. He must have been playing soccer in the park.
4. CAN’T/COULDN’T + HAVE + PAST PARTICIPLE: We are almost sure that something
didn’t happen.
 She can’t have gone with Mario. He was working all day.

4. Check your understanding
1. He ______ come if he wanted.
2. They _____ be rich. They are always buying new things for
their house.
Escoja el modal correspondiente:
a. could have
b. can’t
a. couldn’t
b.must
3. He looks so tired. He _______ been working all day.
a. must have
b. can’t have

5. 1.
a. could have
2.
b. must
3.
b. must have

6. Realice las actividades de práctica de esta
sección en la plataforma.
Let’s practice