Cover of the textbook On Screen B1+/B2 - Student's Book

The key answer of exercise 8

The key to exercise solutions in chapter 2c - Grammar in use for the textbook On Screen B1+/B2 - Student's Book with authors Virginia Evans and Jenny Dooley from Express Publishing

Question

Study the table. Which sentences refer to the: present? past? Which express: positive / negative deduction? uncertainty? Which modals are used for each type?

Answer

Present

  • She must be tired. (positive)
  • She can’t still be working. (negative)
  • She may / might not have reached home yet. (uncertainty)

Past

  • She must have known he wasn’t coming. (positive)
  • She can’t have list the keys. (negative)


  • positive = must
  • negative = can’t
  • uncertainty = may / might