Ability: They were able to catch six fish on their trip., You couldn’t find the website this morning, could you?, Mary can speak 4 languages., Obligation: They must stay away from London, they cannot go there., You don't have to eat anything you don't like., It's a secret. You mustn't tell anyone. , in many five- star restaurants, men have to wear ties to be allowed to get in. , Advice: I have a problem. Should I call my parents or my friend?, It's really cold outside. You ought to wear a warm jacket., You had better not tell your girlfriend about her., Possibility: The clouds cover the top of the mountain. It might be windy there., He may misunderstand if you speak too fast. , The person who steals the money could be one of the employees., John can't be at the door. He's having a meeting with me in zoom., MODAL PERFECT: Jim should have come already, Mary can't have forgotten the date because I had reminded her 3 times, You needn't have helped me yesterday, They might not have known that she was ill.,

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