【文章內(nèi)容簡(jiǎn)介】
ve advice and to tell people what is the best or right thing to do. B should 3. Don’ t feed your dog at the table. 4. Don’ t leave your pet at home alone for too long. You should not/ shouldn’ t feed your dog at the table. You should not/shouldn’ t leave your pet at home alone for too long. must 1. You must feed your pet. 2. You must look after your pet. 3. You must not/ mustn’ t feed your dog too much food. 4. You must not/ mustn’ t bring your pet to school. We use ‘ must’ to tell people that it is necessary or very important to do something. We use ‘ must not’ to tell people that it is necessary or very important not to do something. B How to look after a pet Dogs like lots of exercise. You _____ walk them in the park once a day if you want them to be healthy. If you don’ t have enough time, you ________ get one. must not should