Unit 4

Grammar

Modals of obligation and prohibition

OBLIGATION

Must and Have to

Must use when comes from the speaker

Have to use when comes from a third person

PROHIBITION
Mustn´t

RECOMENDATION
Should use when it is a good idea
Shouldn´t use when it is a good idea


Exercises

1.Correct the mistakes

1. you must to come here now: You must comes here now

2. I have finished. What I should do now?: I have finished.What should I do now?

3. You do not must smoke in the office: You mustnt smoke in the office

4. You have not to wear a suit, but you can if you want to: You dont have to wear a suit, but you can if you want to

5. Shouldnt you to be at home now: Shouldnt you be at home now

6. Am I have to buy a ticket?: Do I have to buy a ticket

7.She does not have to cleaning her room every, only at weekends: She does not have to clean her room every, only at weekwnds

8. our boss have to be in the office at 7.00 a.m: our boss has to be in the office at 7.00 a.m

9. I must going to the station now: I must go to the station now

10. we are do not have to walk. we can take the car: we do not have to walk. we can take the car

2. Complete the sentences using the words in brackets

1. you do not have wear a suit to work

2. we should buy our tickets in advence

3. he should not to all the lights before he can go home

4. you do not have to get if you want to enter the country

5. you should not now. it is cold outside

Question tags

It use only when you speak English

• Form: repeat the auxiliary verb + subject
• Affirmative: use auxiliary in form negative + subject
• Negative: use auxiliary in form affirmative + subject
• If there is no auxiliary verb you can use Do, Did, Does or their negatives

Exercises

1. Complete each sentences with a question tag

1. You haven´t eaten spaghetti before, have you?

2. You haven´t used chopsticks before, have you?

3. You didn´t revise, did you?

4. You have never played the violin before, have you?

5. You are not nervous, are you?

6. You arrived from Rusia, didn´t you?

2. match the question tags a-l, to the sentences 1-12

1. We are going home now, c) aren´t we

2. You will be back tomorrow, f) won´t you

3. She has eaten already, j) hasn´t she?

4. I am on the list, h) aren´t I

5. You are from Ghana, i) aren´t you?

6.He won´t shoot, d) will he?

7. they work here, k) don´t they?

8. We stayed here before, a) didn´t we?

9. You eat meat, b) don´t you?

10. She plays the guitar, e) doesn´t she?

11. they were in your class, l) weren´t they?

12. I passed my exam, g) didn´t I ?

First conditional with if/when/unless/as soon as

If use for real possibilities in the future Form: if+present simple+will, can, should, may

Unless means if not Form: unless+present simple+ will

When used show the situation is 100% certain Form: when + present simple+will

As soon as to emphasise thar an event happens inmediately Form: present simple + as soon as+ present simple

conditional zero used when things that are always true Form: if+present simple+ past simple