LESSON 2 - MUST & HAVE TO

MUST vs HAVE TO

MUST and HAVE TO express a positive obligation.

• MUST express a personal obligation:

- You must read the book to approve the exam.

- I must clean up my room today.

• HAVE TO express obligation to others:

- We have to give Molly her book. 

- Hannah has to wait for her brother to go home.

MUST NOT vs DO NOT HAVE TO

• MUST NOT is a negative obligation (prohibition)
• DO NOT HAVE TO is not a negative obligation. It means one is free of not doing it (Optional).

- You do not have to stay up late. (Optional)

- The children must not play in the office. (Prohibition)

Watch the following video and pay attention to the pronuntiation:

Exercises

Use MUST, HAVE TO, MUST NOT or DO NOT HAVE TO, to complete the sentences:

1. Do you want to go to the game? Sorry, I can't. I __________ finish my homework.
2. Susan is busy today. She __________ take her grandma to the doctor.
3. You __________ clean the table. My mom will do it.
4. We __________ leave the school until we clean the classroom.
5. I __________ buy some eggs. Let's go to the supermarket.
6. Donald and Stacey __________ learn English if they want to study in England.
7. You __________ tell anybody what happened.
8. I __________ come next Monday. I already completed the program.
9. We __________ tell Susy to bring the book.
10. Rob __________ speak with strange people.