modals Have to - must topic for sixth grade

Presentation

1. Have to - must Both are modal verbs Both have the same meaning in positive form These are used to express something important : Law , rule or obligation You have to study for your evaluation You must study for your evaluation Examples :

2. Must – Affirmative /positive form It’s the easiest one Don’t change its form – It is the same for all the pronouns I must She must He must It must You must we must They must Examples : She must study for the test He must have a computer for his job You must see that documentary They must have a Passport for the trip

3. Have to – Affirmative /positive form It changes depending on the pronoun She has to He has to It has to I have to You have to We have to They have to Examples : She has to go to the hospital You have to play in that match They have to go to work tomorrow

4. Must – Negative form Structure Subject + must + not + verb + complement I must not / mustn’t She must not / mustn’t He must not / mustn’t It must not / mustn’t You must not / mustn’t we must not / mustn’t They must not / mustn’t Examples : She mustn’t go to that event He mustn’t eat too much We must not pay for that service The ‘T’ in musn’t is silent

5. Have to – Negative form When we use Have to in a negative context , we need the auxiliar Do Whe we use the auxiliar, these sentences are not mandatory but your decision She doesn’t have to He doesn’t have to It doesn’t have to I don’t have to You don’t have to We don’t have to They don’t have to Examples : She doesn’t have to go to the hospital You don’t have to play in that match They don’t have to go to work tomorrow Structure Subject + Don’t / Doesn’t + have to + verb + complement When we use doesn’t , It means that its singular. So, it is not necessary to modify Have to .

6. What about past ? Must It’s not posible to use Must in past because this doesn’t have a past form . So, that’s why we use have to . Have to Affirmative / positive form Subj + had to + base verb + compl . Negative form Subj + did not / didn’t + have to + base verb + compl . They didn't have to travel I didn't have to go to school  She didn't have to play the song Examples :