1. Unit 7
Should\must

2. Must = Have to + inf Has to + inf It is necessary to + inf
present
Must =
Have to + inf
الإلزام
Has to + inf
It is necessary to + inf
be +allowed to + inf

3. past Must = Had to + inf It was+necessary+inf
Was\were + allowed to + inf

4. future Must = Will + have to +inf It will +Be + necessary to + inf
Will be + allowed to + inf

5. Examples: She must do her H.W. (has) She has to do her H.W.
She must wash the dishes. (necessary)
It is necessary for her to wash the dishes.

6. be + not +allowed to + inf
النفي
Mustn’t =
Don’t +Have to + inf
Doesn’t+ have to +inf
It isn’t+ necessary to + inf
be + not +allowed to + inf

7. Examples: She mustn’t do her H.W. (have) She doesn’t have to her H.W.
She mustn’t wash the dishes. (necessary)
It isn’t necessary for her to wash the dishes.

8. Am-Is\Are +sub +allowed to + inf?
السؤال
Must? =
Do + sub + Have to + inf?
Does + sub + have to +inf?
Is it +sub+ necessary to + inf?
Am-Is\Are +sub +allowed to + inf?

9. Examples: Must she do her H.W? (have) Does she have to do her H.W?
Must she wash the dishes. (necessary)
Is it necessary for her to wash the dishes?

10. My advice to you is to +inf
النصيحة
Should=
Ought to +inf
Had better + inf
If I were you, I’d……
I advise you to +inf
My advice to you is to +inf

11. Examples: You should work hard. (better) You had better work hard.
You ought to drive carefully. (if)
If I were you I’d drive carefully.

12. Shouldn’t= Oughtn’t to +inf Had better not + inf
If I were you, I wouldn’t……
I advise you not to + inf
My advice to you is not to +inf

13. Examples: You shouldn’t work hard. (better)
You had better not work hard.
You oughtn’t to drive fast. (if)
If I were you, I wouldn’t drive fast.

14. Choose the correct answer:
1- You…….go and see your grandparents.
a-should b-shouldn’t c-mustn’t d-can
2-I ……..go home now. I have to get up early.
a- should b-must c- mustn’t d- shouldn’t
3-You…….smoke here. it's forbidden.
a-must b-mustn’t c-should d-shouldn’t
4-People…….cover meat to avoid infection.
A-must b-should c-shouldn’t d-can

15. 5-One ……..drive slowly to avoid accidents.
a-must b-mustn’t c-should d- shouldn’t
6-You………climb the trees or you will fall.
a- would b-mustn’t c- should d- might
7-people……..leave meat lying around.
a-must b-should c-shouldn’t d- may
8-little children…..ride abike in the park.it’s prohibited.
a-must b-should c-shouldn’t d-mustn’t
9-you…….eat breakfast before going to work.
A-must b-should c-may d- can