Inglés III (Miércoles, 5/12/12)

Expresar obligación en inglés - Expressing obligation

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

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 menos moral y menos fuerte que must.

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

Sheila has to go to Madrid to see her friends.

-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.

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

EJERCICIOS DE REPASO:

1. Fill in the gaps with the verb in brackets. Use PRESENT SIMPLE or PRESENT CONTINUOUS

• Mary __________ (go) to the supermarket on Fridays.
• They usually ___________ (eat) fish
• Now I _____________ (understand) the sentence.
• We ___________ (have) dinner right now.
• _______ you _________ (watch) at the moment?

2. Fill in the gaps with the adjective in brackets. Use the COMPARATIVE form

• Spain is ___________ (hot) _____ England
• This film is ____________ (good) ______ the book
• The exam is ______________ (easy) _______ the exercises
• German is __________________ (difficult) ________ English
• A Mercedes car is _____________ (expensive) _______ a Seat car.

3. Fill in the gaps with the adjective in brackets. Use the SUPERLATIVE form

• This is ________________ (long) river in the world
• Mary is  _______________(short) girl in the class
• This is _____________(happy) day of my life.
• Rocky IV is ________________ (bad) film ever
• This is _________________ (comfortable) sofa in the house

4. Fill in the gaps with the verb in brackets. Use PAST SIMPLE or PAST CONTINUOUS

• It started to rain while I ________________(paint) the fence
• We were going to the doctor when we ____________ (meet) Alice in the street
• She interrupted me while I _____________ (study) English
• What ________ you ___________ (do) at 4 o'clock yesterday?
• _______ you _________ (see) your father yesterday?

5. Complete the chart with the correct PLACE PREPOSITION

6. Complete the sentences with MUST, MUSTN'T, HAVE TO, HAS TO, DON'T HAVE TO or DOESN'T HAVE TO

• I have some money. You _______________ (go) to the bank
• Sally has no food at home. She ___________ (go) to the supermarket
• I __________ (see) Alice. It's a long time without meeting her.
• I ____________ go to London tomorrow for work
• You _____________ (use) a mobile phone in class.

7. Fill in the gaps with SOME, ANY or NO (pulsa si no recuerdas la teoría de este ejercicio)

• I haven't got _______ money in my pockets
• There is _________ sugar in the cupboard
• Have you got _______ milk?
• We have got ________ food at home. We have to go to the supermarket
• There weren't ________ people at the cinema today.

8. Complete the sentences with MUCH, MANY or A LOT OF (pulsa si no recuerdas la teoría de este ejercicio)

• There are _________  people in the queue 
• There is ________  money in that bag
• I don't have ________ time
• Have you got ________ brothers?
• There are __________ people at the party