Inglés - 3 Presencial - Miércoles 2 de diciembre

-Expresar obligación - Expressing obligation

• MUST. ("Deber") - Indica una obligación fuerte, de tipo moral e ineludible

I must study hard for this exam.

I must go to work every morning.

-Es un verbo que no añade -s en 3ª persona del singular y que no necesita verbo auxiliar para negar o preguntar.

• MUSTN'T - Indica prohibición. 

You mustn't smoke here

You mustn't step the grass

• HAVE TO - ("Tener que") - Indica una obligación impuesta por las leyes o la necesidad (no es una obligación impuesta por uno mismo)

There's nothing to eat. We have to go to the supermarket

In Spain, you have to be 18 to drink alcohol.

-Have to sí se conjuga como un verbo normal y añade -s en 3ª persona de singular y necesita auxiliares para negar y preguntar.

• DON'T HAVE TO/DOESN'T HAVE TO. ("No tener que") - Indica que no hay obligación, ausencia de obligación.

I don't have to work today, it's Sunday.

I have tickets, she doesn't have to buy one.

- Completa estas frases con MUST, MUSTN'T, HAVE TO, HAS TO, DON'T HAVE TO Y DOESN'T HAVE TO

• People _____________ wear a helmet on a motorbike
• You _____________________ pay for the ticket. It's free today.
• The president ________________ visit the refugees and see their situation
• You _________________ park your car on the yellow line
• Sarah ____________ to go to the supermarket tomorrow. She has no food.

Practica: must/have to,  mustn't/don' have to