We are studying modal verbs.

Have to: in order to make questions and negative sentences we need the auxiliary verb do.

 can, must, should: when  followed by another verb, NEVER use to. They are auxiliary verbs, so when we put them in a question, we just change the order of the words: Can I? Should we? Must he? and if we have to make a negative sentence we add not: I cannot, I must not, I should not. 

Can is sometimes similar in meaning  to Being allowed. You can either say: We are not allowed to smoke here or We can´t smoke here.

In our lesson today we practiced those verbs. We also listened to a recording of 2 teenagers talking about things they have to do or don´t have to do and about things adults have to do as opposed to teenagers.

For homework:
Write about yourself as a teenager: What was your life like? What did you have to do at home and in school?