CAMPGROUND CAPER. Дербышева Н.А. - 34 стр.

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You might have left your bag in the classroom. You should go back and look

around

You may have left it elsewhere around.

Someone could have picked it up and left at the doorkeeper.

PRESENT

(OBLIGATION, REDOMMENDATION AND PERMISSION)

Obligation

In order to express obligation (that is something that you are obliged to do

because it is the law or a rule or an individual forces you to do) they use must, need

to, have to or have got to:

You must get to work by

You need to wear the right clothes.

You have to use the key code to get into the building.

You've got to leave the building if you hear the fire alarm.

To say that something is forbidden for doing they use must not

Visitors mustn't bring food and feed the animals in the zoo!

When you're being tested you mustn't look up any reference book.

To say that something is not compulsory they use don't have to, don't need to,

need not (needn't)

The employees don't have to work late hours.

We needn't go shopping for a while.

Recommendation

To recommend doing something because it is better or right they use had

better, ought to or

We'd better leave for the airport early.

He ought to give up smoking or he is going to have health problems.

You should book the plane tickets through Internet. It takes no time.

To say that something is not recommended they say ought not to (oughtn't to),

should not (shouldn't) or had better not.

You oughtn't to eat too much fat. You'll get a cholesterol problem.

You'd better not forget about fruit and vegetables for your breakfast.