人教版九年級(jí)英語下冊(cè)《We're trying to save the earth!》SectionA PPT課件下載(第3課時(shí))，共56頁。
Objectives
To learn about Present progressive, Passive voice, Present perfect and Modal verbs.
Warming up
Have you ever taken part in an environment project?
What should you do to save the environment?
① turn off the lights when…
② use the paper bags...
③ walk to school...
Language points
現(xiàn)在進(jìn)行時(shí)
現(xiàn)在進(jìn)行時(shí)表示現(xiàn)在或現(xiàn)階段正在進(jìn)行或發(fā)生的動(dòng)作。
① 肯定句: 主語 + am/is/are +v-ing
② 否定句: 主語 + am/is/are + not +v-ing
③ 疑問句: Am/Is/Are + 主語 +v-ing
現(xiàn)在進(jìn)行時(shí)的用法
1.表示說話時(shí)正在進(jìn)行的，目前正在發(fā)生的動(dòng)作。
常帶有表示目前時(shí)刻的時(shí)間狀語如：now, at the (very) moment, for the time being, at present, 及Look! Listen! ...
① Look! The big bird is flying away.
看，那只大鳥正在飛走。
② He is watching a movie now.
他現(xiàn)在正在看電影。
2.表示目前一段時(shí)間內(nèi)正在進(jìn)行，但說話時(shí)可能沒有進(jìn)行的動(dòng)作。
Right now I am studying Chinese by distance learning.
我現(xiàn)在正通過遠(yuǎn)程教育學(xué)習(xí)漢語。
3.與always, constantly, forever, all the time等副詞連用，表示動(dòng)作反復(fù)或習(xí)慣。此時(shí)句子常含有說話者的強(qiáng)烈情感在內(nèi)。表達(dá)較強(qiáng)的“責(zé)備”或“表揚(yáng)”之意。
① You are always changing your mind.
你總是主意不定。(太煩人了。)
② He is always helping others.
他總是幫助別人。(他真是個(gè)好人。)
4.對(duì)于come, go, leave, arrive, start等表示位置移動(dòng)的動(dòng)詞常可用進(jìn)行時(shí)態(tài)表將來。
① He is leaving on Wednesday.
他將于周三離開。
② Mary isn’t here at the moment. She is coming later.
瑪麗現(xiàn)在不在這兒，她一會(huì)兒來。
used to do & be used to doing
used to do sth. 表示過去常常做某事，而現(xiàn)在往往不做了，后接動(dòng)詞原形
be used to doing sth. 表示習(xí)慣于做某事
I used to get up at six o’clock.
我以前六點(diǎn)鐘起床。
Joe is used to drinking a cup of coffee every morning.
喬習(xí)慣每天早晨喝一杯咖啡。
Translation.
1.她過去常常周末和朋友閑逛。
She used to hang out with friends on weekends.
2.他習(xí)慣于每天晚上睡得很晚。
He is used to staying up every night.
被動(dòng)語態(tài)：Passive voice
定義：表示主語是動(dòng)作的承受者，即行為動(dòng)作的對(duì)象的一種語態(tài)。
結(jié)構(gòu)：be + 過去分詞
A new school was built last year.
Our classroom is cleaned every day.
①一般現(xiàn)在時(shí)的被動(dòng)語態(tài)：am/is/are + v-ed
The first section of New College English is designed for speaking practice and is based on pictures and topics.
②一般過去時(shí)的被動(dòng)語態(tài)：was/were+ v-ed
These computers were made in our own country last year.
③一般將來時(shí)的被動(dòng)語態(tài)：will/shall+be+v-ed
Shall we be asked to attend the opening ceremony?
現(xiàn)在完成時(shí): Present Perfect
定義：表示動(dòng)作已經(jīng)完成, 但對(duì)現(xiàn)在造成影響；或者表示從過去某一時(shí)間開始一直延續(xù)到現(xiàn)在并還可能持續(xù)下去的動(dòng)作。
標(biāo)志詞：already, yet, ever, never, since, for…
I haven’t finished my homework yet.
現(xiàn)在完成時(shí) — 構(gòu)成
肯定句：主語 + have / has + v-ed + 其他
否定句：主語 + haven’t / hasn’t + v-ed + 其他
一般疑問句： Have / Has + 主語 + v-ed+ …?
肯定答語：Yes, 主格代詞 + have / has.
否定答語：No, 主格代詞 + haven’t / hasn’t.
情態(tài)動(dòng)詞
情態(tài)動(dòng)詞本身有一定的詞義， 表示說話人的情緒、態(tài)度或語氣， 但不能單獨(dú)作謂語， 只能與其他動(dòng)詞構(gòu)成謂語。常見的有: can (could), may(might), must, need, shall (should), will (would)等。
情態(tài)動(dòng)詞無人稱和數(shù)的變化，后接動(dòng)詞原形。否定式是在情態(tài)動(dòng)詞后面加not。個(gè)別情態(tài)動(dòng)詞有過去式形式，可用來表達(dá)更加客氣、委婉的語氣。
Ken can climb up the trees like a koala.
Tracy could ride a bicycle when she was five years old.
You mustn’t play with fire. It is dangerous.
Homework
Review Present progressive, Passive voice, Present perfect, used to and Modal verbs.
Preview the new words and expressions
Preview Section B on page 101.
... ... ...
關(guān)鍵詞：We're trying to save the earth! PPT課件免費(fèi)下載，.PPTX格式；
