Expressing Possibility & Making Deductions

Attachments:

• Modals

1. Possibility
   1. Past
      1. may/ might + have + past participle
         1. may
            1. They may have arrived hours ago.
         2. might
            1. I might have read the book , but I'm not sure .
         3. could
            1. You were lucky . You could have been hurt.
   2. Present+ Future
      1. -
         1. modal+ not + base
            1. may not
               1. We may not go to the conference.
            2. might not
               1. If we don't hurry , we might not be on time.
      2. +
         1. modal + base
            1. can
               1. It can be very cold in winter.
            2. might
               1. They might come later.
            3. may
               1. He may come by car.
            4. could
               1. He could be at home now.
2. Deduction
   1. Present
      1. +
         1. Modal+ base
            1. must
               1. My father must be at work now.
      2. -
         1. Modal+ not + base
            1. can't
               1. You can't be serious.
   2. past
      1. -
         1. Modal + not + have + past participle
            1. can't
               1. I can't have left it in the supermarket , I had it on the bus on the way home.
            2. couldn't
               1. You couldn't have met their parents . They live in the UK.
      2. +
         1. Modal + have + past participle
            1. must
               1. I must have left my wallet at home