Unit 13 We're trying to save the earth! Section A Grammar Focus-4c课件2022-2023学年人教版九年级英语全册

Unit 13 We're trying to save the earth! Section A Grammar Focus-4c preview try to do sth. 尽力做某事 badly be good for 对……有益 严重地 used to do sth. 过去常常做某事 not any longer 不再…… Grammar Focus We're trying 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 shark fins are good for health. (Present perfect ) We should help save the sharks. Modal verbs Fill in the blanks with the correct forms of the verbs in brackets. 4a Joe: _____ you ever ______ (take) part in an environmental project ? Eric: Yes, I have. I ______ (help) with a Clean-Up Day last year. It was __________ (consider) the biggest clean-up project this city ____ ever ____ (have). Have had considered helped taken had Fill in the blanks with the correct forms of the verbs in brackets. 4a Joe: How many people ____ (take) part? Eric: 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. Eric: Yes, we can’t afford to ____ (wait) any longer to take action! think wait trying came took 4b Fill in the blanks with the appropriate modal verbs from the box. can would could have to should must may/ might People __________ think that big things_____ be done to save the earth. Many forget that saving the earth begins with small things. For example, you ____ save might/may could/can/should must/have to 4b Fill in the blanks with the appropriate modal verbs from the box. can would could have to should must may/ might electricity by turning off the lights when you leave a room. You ______ also use reusable bags instead of plastic bags. I think it’s a great idea that you n