Matching Pairs Have to, must and shouldOnline version Match the correct modal verb with the right obligation or advice. by Zaira Tristancho R 1 You _______ call her tomorrow. She is worried. 2 You ________ swim in this lake. It is dangerous. 3 You ________ go alone to the concert. Try to invite someone! 4 You _________ to go home if you don't want. 5 You _______ work tomorrow. What a bad thing! 6 You ________ be quiet when the teacher is explaining the topic. must not should not don't have to must should have to