1. Smart Choice Level 3 Unit 6 - Grammar

2. Should and Have to
We use “should” to
ask for advice. (조언)
2. give advice.
Advice: words given to someone usually to help that person in some way.

3. Ask for advice. Give advice.
You should exercise every day.
What should I do to lose weight?
Ask for advice.
Give advice.

4. Give advice. Give advice. Ask for advice.
No. You shouldn’t call her too soon!
Yeah. You should call her right now!
Should I call her?
Give advice.
Give advice.
Ask for advice.

5. Should and Have to
We use “should” to
3. make suggestions. (암시)
Suggestion = an idea that someone thinks is good or bad for someone else to do.

6. You should try this new burger.
He thinks the burger is very delicious, and it would be a good idea for you to try it.

7. You should come to Busan this summer.
They think Busan is a great place, and it would be a good idea for you to visit Busan.

8. 1. talk about obligations. (의무)
Should and Have to
We use “have to” to
1. talk about obligations. (의무)
Obligation = something you don’t have much choice in; something you must do; a duty; a responsibility.

9. She must get a job. If she has no job, she will have no money to live.
I have to get a job after I graduate.
She must get a job. If she has no job, she will have no money to live.

10. We have to take care of our children.
It is parents’ duty to take care of their children. They cannot leave their children without care. They must take care of them.

11. Should and Have to
We use “have to” to
2. talk about rules. (규칙)
Rule: Something you can or cannot do according to someone of higher authority.

12. You have to speak only English.
The teacher has higher authority than the students. She says they can speak only English in class.

13. We have to wear a swimming cap.
The pool managers have higher authority than the customers. They say people cannot swim if they don’t wear a swimming cap.

14. When making an affirmative rule, use “have to.”
Should and Have to
When making an affirmative rule, use “have to.”
You have to speak only English in class.
When making a negative rule, use “shouldn’t.”
You don’t have to speak Korean in class. (x)
You shouldn’t speak Korean in class. (o)

15. when something is not necessary. not necessary = You don’t need it.
Should and Have to
We use “don’t have to”
when something is not necessary.
not necessary = You don’t need it.

16. I don’t have to get up early on Sunday.
Every day, she gets up early and goes to work. But today is Sunday, so she can sleep longer. She doesn’t need to get up early.

17. It’s ok. You don’t have to eat it.
She doesn’t like vegetables. Her mom thinks it’s ok not to eat them. She doesn’t
need to eat them.

18. should + verb (base form) should not / shouldn’t + verb (base form)
Should and Have to
should + verb (base form)
should not / shouldn’t + verb (base form)
should(n’t) exercise (o)
should(n’t) exercising (x)
should(n’t) to exercise (x)
should(n’t) be exercise (x)

19. have to + verb (base form) don‘t have to + verb (base form)
Should and Have to
have to + verb (base form)
don‘t have to + verb (base form)
(don’t) have to exercise (o)
(don’t ) have to exercising (x)
(don’t) have to be exercise (x)

20. Should and Have to should 1. ask for advice 2. give advice
3. suggestions (good idea)
shouldn‘t
3. suggestions (bad idea)
4. negative rules
have to
1. obligations (must); necessary
2. affirmative rules
don‘t have to
1. not necessary

21. Now Practice! 1. It’s really cold outside. You should wear a coat.
2. You don’t look very well. Maybe you should go to the doctor.
3. You shouldn’t watch this movie. It’s not very good.
4. The phone is ringing. Should I answer it?
5. It’s getting late. We should eat dinner soon.
6. You shouldn’t drive there. The car isn’t working very well.

22. Now Practice! 1. Don’t call me. It’s not necessary.
You don’t have to call me.
2. Drink a lot of water. It’s a good idea.
You should drink a lot of water.
3. Drink water every day. It’s necessary.
You have to drink water every day.
4. Don’t tell me again. I understand you.
You don’t have to tell me again.
5. Take this medicine. It’s necessary.
You have to take this medicine.