Read the Learn this! box. Underline must / have to + infinitive in the dialogue. Then complete the following sentences using 'must', 'mustn’t', 'have to', 'don’t have to'

01 Đề bài:

LEARN THIS! 'Must' vs 'have to'

a. Must and have to both mean obligation. Must expresses obligation imposed by the speaker while have to expresses external obligation.

b. Mustn't: it’s necessary not to do something

You mustn't use a dictionary during your test.

c. Don't have to: it’s not necessary to do something

You don't have to answer all of the questions.

3. Read the Learn this! box. Underline must / have to + infinitive in the dialogue. Then complete the following sentences using 'must', 'mustn’t', 'have to', 'don’t have to'.

(Đọc Learn this! Gạch dưới must/have to + infinitive trong đoạn hội thoại. Sau đó hoàn thành các câu sau sử dụng 'must', 'mustn't', 'have to', 'don’t have to')

1. A hotel receptionist ____________ be good at communication.

2. You ____________ pay for the tickets in advance.

3. Examinees ____________ switch off all modern gadgets during the exams.

4. You ____________ leave litter lying around.

02 Bài giải: