Unit 13 Language StudyWord study & Modal Verbs Yan Dang Mountain Water canAbilityWhat Properties does water have?turn solid when frozen dissolve gases and solidsgive off gas when heated What does he/she hope he/she can do?AbilityShe can perform ballet( 芭蕾 ).He hoped he could fly a plane.On Oct.15,2003, he was able to (× could) complete China’s first space flight. What ability would you like to develop?I hope I can …I hope I am able to…I wish I could…Ability NecessityWhat do you need to do in order to reach your ability?I must/should…I have (got) to …I need to… Ability NecessityI must/should…I have (got) to …I need to… I hope I can …I hope I am able to…I wish I could… Request PermissionThe road signs indicate People may/can… PermissionWhen a driver sees the road signs, he mustn’t/can’t… When a driver sees the road sign, he must/have (got) to/should… Necessity As many as 3000 million people throughout the world could As many as 3000 million people throughout the world could face a water shortage by 2025 if the present situation face a water shortage by 2025 if the present situation continues. By then, the global population is expected to reach continues. By then, the global population is expected to reach about 7.5 billion. Many big cities, including Beijing, Shanghai about 7.5 billion. Many big cities, including Beijing, Shanghai and Tianjin, will suffer severe water shortages, …and Tianjin, will suffer severe water shortages, …If it is true, what may or will happen in the If it is true, what may or will happen in the future?future?What should people do to solve the problem?What should people do to solve the problem? GuessingA water shortage can/could …Lack of wate...
