گرامر

Page 87 - Exercise 4

Grammar focus - Past Modals for degrees of certainty

It’s almost certain.

She must’ve left already. She must not have turned on her phone.

It’s not possible.

She couldn’t have been at home.

It’s possible.

She may have forgotten the time. She might have forgotten the time. She may not have remembered the time. She might not have remembered the time. Her car could’ve broken down.