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Obligation and necessity. Miss María Ruth Castillo Ubillús. What we learn today ?. Indicate obligation and prohibition State absence of obligation Establish an internal or external obligation Improve your vocabulary related to transport. OBLIGATION AND NECESSITY.
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Obligation and necessity • Miss María Ruth Castillo Ubillús
Indicate obligation and prohibition • State absence of obligation • Establish an internal or external obligation • Improve your vocabulary related to transport.
OBLIGATION AND NECESSITY AUXILIAR Y VERB: • I must pay attention to certain things. • You must take a few minutes to familiarize yourself with the car. • I must getup early tomorrow. There are a lot of things I want to do. subject mainverb auxiliaryverb must
OBLIGATION AND NECESSITY • You have to get used to the rules. subject to main verb auxiliary verb • The sign has to show the direction that the different roads to take you.
PROHIBITION Musn´tvs. have to and don’t have to Internal and external obligation • You mustn’t park on double yellow lines. • You must not eatthat. subject not main verb auxiliary verb: must IT IS FORBIDDEN, IT IS NOT ALLOWED.
PROHIBITION • There’s a free space. You don’t have to pay. subject not main verb auxiliary verb: do You don’t have to eat that. YOU CAN IF YOU WANT TO, BUT IT IS NOT NECESSARY.
OBLIGATION AND NECESSITY • The obligation comes for some other person. • I have to get early tomorrow. I start working at 7.30 am. subject main verb to auxiliary verb: have
it is followed by infinitive HAVE TO HAS TO is used for the third person are used for the interrogative and negative forms. DO/DOES we use don’t have to say that there’s no obligation to do something. It isn’t necessary. You have a choice. DON’T HAVE TO • He doesn’t have to drive so slowly.
Interrogative form • Mustn’t you park in yellow lines? must subject not main verb • Do you have to pay? • auxiliary verb • have main verb subject Example How do you have to get out of the roundabout?