MODALS OF OBLIGATION Must have to dont have

MODALS OF OBLIGATION Must, have to, don’t have to, mustn’t

MODALS OF OBLIGATION AFFIRMATIVE MUST HAVE TO (HAS TO) HAD TO WILL HAVE TO HAVE (HAS) HAD TO USE 1) When the obligation is personal + base form 2) To strongly recommend or offer something + base form To talk about a rule for us made by somebody else To talk about things that are necessary because of the circumstances EXAMPLES 1) I must finish my homework before I go out. 2) You must study for the exam. We have to take our shoes off in the gym. She will have to go to the dentist if she’s got a toothache. I didn’t go out last night because I had to look after my brother. Paul has had to walk home because she missed the bus.

MODALS OF OBLIGATION NEGATIVE USE 1) Prohibition MUSTN’T DON’T HAVE TO DOESN’T HAVE TO + base form 2) When it is necessary NOT to do something 1) Something is not necessary to do 2) Lack of obligation EXAMPLES 1) You mustn’t talk during the exam. 2) You mustn’t forget to bring your gym kit tomorrow. 1) You don’t have to bring a present for my birthday. 2) You don’t have to go if you don’t want.

MODALS OF OBLIGATION REFERENCES PRESENT PERFECT PRESENT PAST FUTURE MUST ------- MUST ----- HAVE TO HAD TO WILL HAVE TO HAVE HAD TO DON’T HAVE TO DIDN’T HAVE TO -----