2 Must = Have to + inf Has to + inf It is necessary to + inf presentMust =Have to + infالإلزامHas to + infIt is necessary to + infbe +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 النفيMustn’t =Don’t +Have to + infDoesn’t+ have to +infIt isn’t+ necessary to + infbe + 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? السؤالMust? =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 النصيحةShould=Ought to +infHad better + infIf I were you, I’d……I advise you to +infMy 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 + infMy 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-can2-I ……..go home now. I have to get up early.a- should b-must c- mustn’t d- shouldn’t3-You…….smoke here. it's forbidden.a-must b-mustn’t c-should d-shouldn’t4-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’t6-You………climb the trees or you will fall.a- would b-mustn’t c- should d- might7-people……..leave meat lying around.a-must b-should c-shouldn’t d- may8-little children…..ride abike in the park.it’s prohibited.a-must b-should c-shouldn’t d-mustn’t9-you…….eat breakfast before going to work.A-must b-should c-may d- can