• Modals (must/have to/need to/might) * Fill in with the correct form of mustn't, don't need to/don't have to. 1 We don't have to/don't need to be at school until 9 o'clock. 2 You get stressed about the homework - it's easy. 3 You eat too much junk food - it's bad for your health. change her 4 She diet – she always eats healthy food. 5 The children watch too much – it's bad for their eyes.