ENGLISH LESSON

HAVE TO / DON’T HAVE TO / MUST / MUSTN’T

We use "must”: For a necessity, an obligation or a certainity

We use “mustn’t”: For a prohibition

We use "don't have to" or "doesn't have to": No obligation or no necessity.

EXAMPLES:

Necessity, obligation or certainity: I must be careful, when I cross the road. You must hurry up, if you want to be in time.

Prohibition: He mustn't make noise in the middle of the night. She mustn't smoke in the hospital.

No obligation or necessity: We don't have to buy expensive clothes. They don't have to go to the cinema.

NOW USE THE CORRECT FORM IN THE FOLLOWING SENTENCES

You ........................ learn the words, if you want to pass the test.

I .............................. get up early today, we leave at 5 o'clock a.m.

Paris .................................. be a most interesting city.

He .............................. smoke in the train, it isn't allowed.

I ............................. do this homework, it isn't necesary.

She .................................... park here, it is a no-parking zone.

She .................................... dress nicely for the opera.

There are crocodiles in the water, you ......................................swim here.

The weather is very nice, she ......................................... take an umbrella along.

He ........................................ go to work, he's on a holiday.

We ............................. be late for school.

We ........................................... get up early today, it's Sunday.