Modals of Obligation

have to or need to

to say someting is necessary

Modals of Obligation

have to or need to

• often no difference between them

• Have got to is same as have to (used in spoken English)

Modals of Obligation

have to

• don't use contractions (short forms) with have to
  

Modals of Obligation

must

• very strong and can be formal or official

• often used in written rules and laws

• not common in speaking
  

Modals of Obligation

must

• has no past or future form

• instead we use correct forms of have to or need to

• questions with must are very rare
  

Modals of Obligation

mustn't or can't

• to say that someting is not allowed.

• Can't is mostly used in spoken English.

• Mustn't expresses strong prohibition or that something is forbidden.

Modals of Obligation

couldn't

• for things that were not allowed in the past

Modals of Obligation

don't have to or don't need to

• when there is no obligation (it is not necessary)

Modals of Obligation

should and ought to

• to give advice and recommendations

• same in meaning

• ought to is not used in negative - use shouldn't instead

Use the modals:
can/can't
have to/don't have to
must/mustn't
need to/don't need to
should/shouldn't

Complete the rules about transport

A foreign visitor is coming to live in your country. Use the ideas in the box and your own ideas to make a list of rules and tips.

Give some advice

GIMKIT Time