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They don´t take ` –s/ -es´ in the third person. She cans play the piano beautifully.

They don´t take ` –s/ -es´ in the third person. She cans play the piano beautifully. They are followed by an infinitive without `to’ . She should to eat more vegetables. . They function like auxiliaries in Negative and interrogative sentences.

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They don´t take ` –s/ -es´ in the third person. She cans play the piano beautifully.

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  1. They don´t take ` –s/ -es´ in the third person. She cans play the piano beautifully. They are followed by an infinitive without `to’ . She should to eat more vegetables. They function like auxiliaries in Negative and interrogative sentences. Can you speak louder, please? Do you can speak louder, please? You shouldn´t talk like that. You don´t should talk like that. They have no –ing, infinitive nor past participle forms. cannedcanningto can They provide additional and specific meaning to the main verb of the sentence. You mustn´t drink that water, it´s dangerous. They don´t have all tenses. They use other verbs to do that Can → Be able to Must → Have to

  2. To ask for permisssion: Can I leave earlier? Yes, you can. To express present ability: She can play the guitar To make a request: Can I borrow your pen? To offer to do anything: Can I help you? To express possibility or impossibility: Learning a language can be a real challenge It can´t cost more than a dollar or two. To express past ability: Nancy could ski like a pro by the age of 11. To express possibility: Extreme rain could cause the river to flood the city. To make suggestions: You could see a movie or go out to dinner To make a request: Could I use your computer to email my boss? In conditional sentences: We could go on the trip if I didn´t have to work.

  3. To express Obligation: You must obey the rules. To express necessity: Students must pass an entrance examination to study at this school. To express certainty: This must be the right address!. Have to ( PRESENT , PAST, FUTURE ) To express Obligation: He has had to leave early. To express necessity: The soup has to be stirred continuously to prevent burning To express certainty: This answer has to be right.

  4. Mustn´t To express prohibition: We mustn’t talk about it.It's confidential (We have a strong obligation NOT to talk about it) Don’t have to To express that something is not necessary: We don't have to get there on time. The boss is away today. You don't have to come if you don't want to. (There is no need)

  5. To Advise: You should focus more on your family and less on work. To recommend: When you go to Berlin,you should visit the palaces in Potsdam. To express expectation: By now, they should already be in Dubai. To express Obligation: I really should be in the office by 7:00 a.m OUGHT TO Should and ought to are very similar, and can often replace each other.They are both to talk about obligation and duty, to give advice, and to say what we think it is right for people to do. You ought to focus more on your family and less on work Should is much more frequent than ought to.

  6. WILL Request / Demand / Order (less polite than would) Will you please close the door? Prediction / Assumption: I think it will rain on Saturday. Promise: I will stop smoking. Spontaneous Decision: Can someone give me a ride? I will To offer: Would you like some tea?. To invite: Would you like to go to the cinema? To express repetition in the past: When I was a kid, I would always go to the beach.

  7. To express Possibility: It may rain tomorrow To make a request (formal): May I open the window, please? Johnny, you may leave the table when you have finished your dinner. Give permission: To express possibility: Your purse might be in the living room. To make a request ( very formal): Might I borrow your pen? To make suggestions: You might visit the botanical gardens during your visit.

  8. NEED /NEEDN´T Need is not a modal, but it is used in affirmative sentences, like have to, to express obligation and necessity. I need to cook dinner tonight. Needn’t, on the contrary, is a modal and indicates lack of obligation . The past form of needn't for lack of obligation is needn't have: You needn't go to the meeting. We needn't have mentioned it - they already knew.

  9. POSITIVE, NEGATIVE AND QUESTION FORMS + - ? I can go I can’t go Can I go? I must go You mustn’t go (Must I go?)/Do I have to go? I should go You shouldn’t go Should I go? I ought to go You ought not to go (Ought I to go?)/ Do you think I ought to go?

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