九年级英语全册 Unit 13 We’re trying to save the earth Section A(Grammar foucs)课件.ppt

* Unit 13 We are trying to save the earth. We are try to save the earth. Present progressive The river used to be so clean. used to The air is badly polluted. Passive voice No scientific studies have shown that sharks fins are good for health. Present perferct We should save the sharks. Model verbs Grammar Focus Joe: _____you ever _____ (take) part in an environmental project? Ken: Yes, I have. I _____ (help) with a Clean-Up Day last year. It was_________(consider) the biggest clean-up project this city ever ________(have). Fill in the blanks with the correct forms of the verbs in brackets. 4a Have taken helped considered had had Joe: How many people ______ (take) part? Ken: I _____ (think) more than 1,000 people _____(come) to help out. Joe: That’s fantastic! I guess everyone in this city is _____ (try) to improve the environment. Ken: Yes, we cant affort to _____ (wait) any longer to take action! took think came trying wait Fill in the blanks with the appropriate modal verbs from the box. People _____ think that big things _____ be done. However, many forget that saving the earth begins with small things. For example, you _____ save electricity by turning off the lights when you leave a room. You _____ also use paper or reusable bags instead of plastic bags. 4b can could would have to should must may/might may should could would Make a list fo thingsthat people can do to help the environment and discuss your list with your partner. 4c A: I think that everyone should use public transportation. B: I disagree. its diffcult for parents with young children to use public transportation... use public transportation ... Discussing... 4c use public transportation take your own shopping bags when go shopping reduce the use of air conditioners in summer turn off the lights when you leave the room grow more p