Uploaded by Rusiru Chitrasena - University of Kelaniya

Modal Verbs of Obligation

Write three pieces of advice you can give someone, using
the first conditional form.
1. If you don’t study well, you will fail the exam.
2. If you don’t come to class on time, the teacher will
be angry.
3. If you eat too much sugar, you will get diabetes.
4. If I am ill, my son will take care of me.
5. If my son doesn’t pass his exam, I will be very angry.
6. If I don’t sleep at night, I will have a headache.
7. If I sleep early, I will get up early.
8. I am young, I will have a good memory,
9. If I have a good memory, I will remember lots of
English words.
10. If I have enough vocabulary, I will speak English
11. If you study hard, you will go to university.
12. If you drink too much alcohol, you will mess up
your life.
13. If you ask too many personal questions about
your friends, they will leave you. If you invade your
friends’ privacy, they will leave.
14. If you don’t have a job, you will not have money.
15. If you don’t pass your driving license, you will
have to take the bus.
16. If you don’t have breakfast, you will be hungry
before lunch.
17. If you don’t get sunshine, you will get sick
18. If you break the law, you will go to jail.
19. If you don’t eat, you will die.
20. If you don’t do exercise, you will gain weight.
If I pass the exam, I will go on a trip.
If+ present simple, + will+ base form.
First conditional = Things that will be true in future, if the
condition is true.
If the first part is true, the second part will also be true in
Second conditional = The first part is not true at the
moment, but if it becomes true, the second part will also
be true. But it is less likely (less possibility)
If my friend calls me, I will go out.
If I want to play basketball, I will first go to the stadium.
If I have student visa, I will go on studying English.
If I have a lot of money, I will travel around the world.
If we read more books, we will know more.
If the border re-opens, I will go back to China.
If I have a holiday, I will drink a lot.
If I am hungry, I will cook some food.
If I have a work visa, I will go to work.
Compulsory/Obligatory/mandatory statements (rules)
You must turn off your phone before you come in. (it’s
obligatory/compulsory to do this.)
You have to pay before the end of the month. (less
stronger than must, but it is compulsory)
You mustn't eat here.
You don't have to pay to see this. (If you like, you can pay
but it is not compulsory.)
1. You must go to bed before 10 pm.
2. You mustn’t play computer games from Monday to
3. You have to finish your homework before playing
computer games.
4. You mustn’t eat too much chocolate.
5. You must clean your hands when you get home.
6. You must go to bed before 11 pm.
7. You must help each other.
8. You must have a shower when you get home.
9. You must eat vegetables every day.
10. You have to go to work during the week.
11. You mustn’t eat too much fast food.
12. You have learnt to make breakfast.
13. You mustn’t drive cars until you are 16.
14. You must (shout) make noise in the class.
15. You mustn’t use mobile phones in the class.
16. You have to drink more water.
17. You must eat some food.
18. You mustn’t drink too much beer.
19. You mustn’t drive when you are drunk.
20. You mustn’t cheat at the exam.
21. You must tell the truth all the time.
22. You must wear a mask if you go to school by
23. You must finish your lunch.
Have to
should = giving advice (not compulsory, but
it’s good to do this)
You should drink a lot of water.
You should come home now.
We should finish now.
You should speak more English
You shouldn’t smoke.
Must/mustn’t/ have to = compulsory things
Need to= You need to do this.
Should = for giving advice/ making suggestions (good
things to do)
Shouldn’t = for giving advice /marking suggestions (don’t
do this)
Don’t have to = optional things/ not compulsory
Don’t need to/Doesn’t need to
You need to give some healthy advice to your friend.
How to be healthy. You can use
have to
need to
don’t have to
don’t need to
10 pieces of healthy advice.
1. You must drink a lot of water every day.
2. You have to get up early.
3. You should eat more vegetables every day.
4. You shouldn’t smoke.
5. You shouldn’t drink too much.
6. You shouldn’t go to bed too late.
7. You don’t need/have to work late all the time.
8. You must do exercise every day.
9. You shouldn’t have dinner too late.
10. You should eat two eggs every day.
You must drink two litres of water every day.
You shouldn’t drink too much alcohol or fizzy
You need to quit smoking.
You mustn’t eat too much sugar.
You must eat fresh vegetables every day.
You have to eat some yellow fruit to get vitamin
You need to do some exercise to keep fit.
You don’t have to drink coffee every day.
You must take medicine every day when you
have high blood pressure.
You shouldn’t stay up late.
You should go to bed and get up early.
You must stop complaining.
You mustn’t eat too hot/spicy food.
You must drink green tea everyday with your
You must get a nutritious/balanced diet.
You must cut down your portions. You shouldn’t
eat too much.
You must lose some weight.
You must go for a health check-up regularly.