Grade 9 Grammar Lesson 22 Must and can’t

When do we use ‘must’?
When do we use ‘can’t’?
When do we use ‘must have’ and ‘can’t have’?

• We use must to say that we feel sure something is true.
• We use can’t to say that we feel sure something is not true.
• When we are sure about a past situation, we use must have and can’t have.
  

  Go to page 1 2