Modals of obligation Have to affirmative We use

Modals of obligation

Have to (affirmative) – We use “have to” to say what someone is obliged to do. The speaker is not giving his/her opinion. – For example: – I have to work from 6: 50 until 2: 10. – Jane has to travel a lot for her work. – John has to do his homework. – The students have to stay in school until 13: 30.

Don’t have to / doesn’t have to (negative) – We use “don’t have to” or “doesn’t have to” when there is not obligation. You are not required to do something, especially if you don’t want to. (My opinion matters!) – For example: – I don’t have to study on Sunday. – Mary doesn't have to be on time today. The boss gave her permission to arrive 30 minutes late. – Mike doesn’t have to wake up early on Saturdays.

Affirmative sentences structure SUBJECT HAVE TO / HAS TO I have to YOU have to HE has to SHE has to IT has to WE have to YOU have to THEY have to VERB BASE FORM work COMPLEMENT until five o’clock.

Negative sentences structure SUBJECT DON’T HAVE TO / DOESN’T HAVE TO I don’t have to YOU don’t have to HE doesn’t have to SHE doesn’t have to IT doesn’t have to WE don’t have to YOU don’t have to THEY don’t have to VERB BASE FORM COMPLEMENT wake up early today.