- Understand and use “ Have to” for obligation.. - T: gives the phrases and asks Ss to match them with the pictures.. - Sets the scene, plays the tape for Ss to listen twice.. - Asks Ss to work in pairs, practising the dialogue.. - asks Ss to read the dialogue again to answer.. - Vui have to do after work?. - 2, What does Nam have to do?. - Invites Ss to ask and answer before class.. - Asks Ss to pick out the modals in the text and checks the use, form &. - We can use “Have to” as the below model. - We use “Have to” for the subjective obligation and “Must” for the objective one.. - S + don / t/doesn / t have to + bare-inf.. - Do/Does + S+ have to + bare-inf?. - Example exchange: S1: What do you have to do?. - S2: I have to do the washing S1: What does she have to do?. - T: instructs Ss to practise. - Asks Ss to revise the lesson &. - Asks Ss to prepare: Speak - P.14,15