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Meanings and use. Must Have to Ought to Need to Should Can/ could May/might.

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Presentation on theme: "Meanings and use. Must Have to Ought to Need to Should Can/ could May/might."— Presentation transcript:

1 Meanings and use

2 Must Have to Ought to Need to Should Can/ could May/might

3 Must – obligation imposed by the speaker Have to – obligation imposed by a situation (external obligation)

4 I must finish my homework before 8 We have to start work at 9 am They are both used to express that something is necessary

5 I must find a hotel to stay at tonight (“I have to find a hotel” is also possible) The speaker decides that something is necessary (INTERNAL decision)

6 I have to wear a uniform Somebody else has made the decision, it’s not the speaker’s opinion (EXTERNAL decision)

7 Very different meanings in negative: You mustn’t open the door You don’t have to open the door

8 Have to (obligation) /vs/ don’t have to (lack of obligation) Must (obligation) /vs/ mustn’t (prohibition)

9 Very different meanings in negative: You mustn’t open the door You don’t have to open the door

10 You mustn’t open the door. Lately there have been many robberies in the neighbourhood. (It’s forbidden /prohibited)

11 You don’t have to open the door. I have the keys. (It’s not necessary)

12 Modals and Related Expressions must have to 1. I ……….be at the meeting by 10:00. I will probably ………..take a taxi if I want to be on time. 2. You ………..submit the application if it has not been completely filled out. Check that the name, address, and background information are correct. 3. A: Look at these flowers - they're beautiful! But, there's no card. Who could have sent them? B: It ………have been David. He's the only one who would send you flowers.

13 4. You ……….forget to pay the rent tomorrow. The landlord is very strict about paying on time. 5. You ………….. be so rude! Why don't you try saying "please" once in a while. 6. If you are over 18 in California, you ……. take a driver training course to get a driver's license. 7. You …………be rich to be a success. Some of the most successful people I know haven't got a penny to their name.


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