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Modals to Express Degrees of Certainty, PART 2 (A04)


Emperatriz Angulo

on 21 January 2014

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Transcript of Modals to Express Degrees of Certainty, PART 2 (A04)

What could have happened in this video that made people feel so scared?
Did Aliens build Machu Picchu?
Modals to Express Degrees of Certainty
(Part 2)

Could Machu Picchu have been built by Aliens?
- It must have been
- It may have been
- It might have been
- It could have been
- It couldn't have been
Case I
Case 2
- They must have been
- They could have
- They may have
- They might have
(We're going to use 'Could have' in questions about possibility)
(In questions that include a form of the verb 'Be', the answers include 'been')
What could have happened in this place that everybody says it's haunted?
Full transcript