You ___ wear a helmet when you ride a bike., I ___ swim very well when I was five years old. (X)), We ___ talk in the library because people are studying., She ___ help you with your homework tomorrow., You ___ eat too much sugar; it’s bad for your teeth., He ___ play the piano, but he can play the guitar., Students ___ arrive on time for class., You ___ use your phone during the exam., I ___ understand the exercise yesterday; it was too difficult., We ___ go to the park if it stops raining., You ___ be polite to your teachers., She ___ lift the box because it was very heavy., They ___ watch TV after finishing their homework., You ___ forget your homework at home., He ___ run very fast when he was younger. (V), You ___ shout in class., We ___ see the mountains from here on a clear day., You ___ eat more fruit and vegetables., She ___ come to the party because she was ill., You ___ listen carefully to the instructions..

Modals (can, must, could)

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