7. Getting on - 8. Going away - REVIEW 2 » Стр.44 (1)

Grammar 1. Read the examples. Then complete the rules. a. We use have to and to talk about rules and things that are necessary. b. We use mustn’t when something isn’t allowed by a rule. c. We use don’t have to when something isn’t necessary. We use didn’t have to when something wasn’t necessary in the past. d. We use had to for rules in the past. e. Remember: You mustn't go. = You aren’t allowed to go. You don’t have to go. – It isn’t necessary for you to go.