Unit 4 A good readUnit 4 A good readGrammar 2Gulliver was tied to the ground. So he must run away.Study is very important. So we must study hard.We use must when the speaker feels that something is necessary.He mustnt lie on the ground.We mustnt talk in class.Get the students to make up new sentences using “must”.Gulliver was tied to the ground. He has to lie on the ground.Grandma is ill. She has to see the doctor.We use have to when the situation makes something necessary.She doesnt have to worry about herself.He doesnt have to shout at the tiny men.Get the students to make up new sentences using “have to”.Complete the following sentences with must, mustnt, have to, dont have to.1.You keep quiet in the library.2.You keep the books clean and tidy.3.You draw or write in the books.4.You eat or drink in the library.5.You return the books on time, if you want to keep them longer, you renew them.6.You bring your student card every time you go to the library, but remember to bring your library car.mustmustmustntmustnthave tohave todont have toHomework1.Use must, have to to make more sentences.2. Finish the exercises in your workbooks.