EXPRESSING RULESHave to, Don’t /Doesn’t have to,Can /Can´t /Cannot,Must, Mustn’t.
Expressing rulesExpressing ruleshave to, don’t / doesn’t have to, can, can’t,must, and mustn’t are always folowed by aninfinitive verb without “to”, except “have to”.For example:- I have to study today. I don’t have to studytoday.- I can watch the TV tonight. I can’t watch theTV tonight. (I can to watch the TV tonight)- I mustn’t talk in class. ( I mustn’t to talk in class)
Características de los Verbos ModalesCaracterísticas de los Verbos Modales“have to” becomes “has to” with he, she, or it.For example:- She has to study today.- Marita has to visit Judith on Saturday.- Bruno has to play soccer next time.- The project has to be excellent.- Our uniform has to be neat and tidy.
Have to• We use Have to to express an obligation. Itrefers to actions that are necessary.- I have to take a bus to go to school.(It´s necessary to take a bus to get to school)• Don’t / Doesn’t have to expresses absence ofobligation, something that is not necessary todo.- We don’t have to go to school tomorrow.(It´s not necessary to go to school tomorrow)
Have to (Affirmative)IYou have to study.HeShe has to study.ItWeYou have to study.They
Have to (Negative)COMPLETE FORM CONTRACTED FORMIYou do not have to / don’t have to study.HeShe does not have to / doesn’t have to study.ItWeYou do not have to / don’t have to study.They
Have to (Questions)Do/ Does + Subject + have to + vº infinitive + C + ?Do I have to study English ?youheDoes she have to study English ?itweDo you have to study English ?they
Have to (Questions)If there is a Question Word (Wh-) in the interrogativesentence, it goes at the beginning of th esentence.For example:Wh- + Do/ Does + Subject + have to + vº infinitive + C + ?Why does she have to study English?
Have to (Short Answers)AFFIRMATIVEYes, + subject + do/doesYes, I do.youheYes, she does.itweYes, you do.theyNEGATIVENo, +subject +don’t /doesn’tNo, I don’tyouheNo, she doesn’titweNo, you don’tthey
CAN & CAN’T = CANNOT1. We use can / can’t / cannot + vº infinitive toexpress permission.- I can play in the playground.- I can’t / cannot eat in class.- We can´t write on the tables.- The school van can´t be late for school.
MUSTN’T• We use Must to express strong obligationand duty.• Mustn’t expresses strong prohibition.We must respect the Angelus prayer.- You mustn’t insult your classmates.