Unit13SectionAGrammarFocus-4c课件人教版九年级全册英语.pptxVIP

Unit 13Were trying to save the earth!Section A Grammar Focus-4cpreview对……有益try to do sth.严重地be good for过去常常做某事badly不再……used to do sth.not any longer尽力做某事Grammar FocusWere trying to save the earth.Present progressive The river used to be so clean.used toThe air is badly polluted. Passive voiceNo scientific studies have shown that shark fins are good for health. (Present perfect )We should help save the sharks.Modal verbs4aFill in the blanks with the correct forms of the verbs in brackets.takenHaveJoe: _____ 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).helpedconsideredhadhad4aFill in the blanks with the correct forms of the verbs in brackets.tookJoe: 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!thinkcametryingwait4bFill in the blanks with the appropriate modal verbs from the box.can would could have toshould must may/ mightmight/maymust/have toPeople __________ think that big things_____ be done to save the earth. Many forget that saving the earth begins with small things. For example, you ____ savecould/can/should4bcan would could have toshould must may/ mightFill in the blanks with the appropriate modal verbs from the box.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 now ______ pay for plastic bags in some stores. And instead of driving to school or work, you __________ ride your bike or walk. If it’s far, you __________ take the b