2. USES
• Past: to speculate about the past /to make
thoughts/ to make guesses about the past based
on known facts
• Present: make deductions about the present /
to make guesses about the present based on
known facts
3. GRAMMAR STRUCTURE
• 1- Modals in present
(modal)
Might
Could + infinitive (without –to-) 50%
May
Must
Can´t + infinitive (without –to-) 90%
4. For example….
• Known facts: we are in BCN’s airport and we see
a man carrying a suitcase, who is dressing with
ski clothes, gloves, boots…
• Deduction:
50% He may come from Alaska
90% He must come from a northern-country
5. • Modals in the past:
Must
Can’t + have + p.participle 90%
Might
May + have + p. participle 50%
Could
6. The opposites of must and
must have are can't and
can't have, not mustn't and
mustn't have
