1、Unit 4 Then and now,Part B read and write,Many years ago, I went to this school. I went to school by bike. I loved cycling. Nowadadys , many students go by bus or car. We didnt have computer games then or computers. So we often played badminton in the summer and ice-skating in the winter. We had a g

2、reat time. After school, I often went to the park and read under a tree. It was so beautiful there.,1,2,3,Story time,eat raw meat,吃生肉,做飯,cook their food,help you cook,house robots,幫你做飯,家務(wù)機(jī)器人,wash the dishes,洗碗洗盤子,cook their meat,煮肉,do the dishes,洗碗洗盤子,many clean rivers,more and more buildings,help t

3、he earth,Dont worry!,How beautiful the world was!,live on the earth,住在地球上,住在大海里,live in the sea,have a bright future,heal the world,有廣闊的前景,拯救世界,Make it a better place!,讓它變成更好的世界！,eat,meet,dishes,more,humans,live,see,had,1.ate（原形）_ 2. meat(同音詞)_3. dish（復(fù)數(shù)）_ 4. many（比較級(jí)）_5. human(過去式) _ 6. lived (原形)_

4、7. sea(同音詞) _ 8. have(過去式)_9. better(原級(jí)) _ 10. caveman(復(fù)數(shù))_,P41,good,cavemen,I . They cooked their food.( 否定句）,2. There were many trees. (一般疑問句）,3. We should help the earth. (一般疑問句）,4. Whales lived in the sea. ( 否定句）,They didnt cook their food.,Were there many trees?,Should you help the earth?,Whale

5、s didnt live in the sea.,Try your best!,It was an egg. Now it is a hen.,It was raining. Now it is sunny.,Chen Jie was short. Now she is 1.5 metres tall.,In summer, the tree was green. Now it is yellow.,There was a building before. Now it is a park.,The cat was on the chair. Now it is under the chair

6、.,3. 結(jié)構(gòu),1. 概念,2.時(shí)間,主語(yǔ) + 動(dòng)詞的過去式 + 其它,yesterday (morning ) last (year, week, night, month) in 1990 (過去的年) two days ago the day before yesterday just now = a moment ago,now,past,future,一.一般過去時(shí)的概念,表示過去某個(gè)時(shí)間發(fā)生的動(dòng)作或存在的狀態(tài),一. 規(guī)則動(dòng)詞,look looked 1）一般在動(dòng)詞原形末尾加 ed play played start started 2）結(jié)尾是 e 的動(dòng)詞只加 - d live li

7、ved hope hoped use used,3）末尾只有一個(gè)輔音字母的 重讀閉音節(jié)詞，先雙寫這 個(gè)輔音字母，再加ed,stop stopped plan planned trip tripped,4）結(jié)尾是“輔音字母+y”的詞， 先變“y”為“i”再加ed,study studied carry carried,二.動(dòng)詞過去式的構(gòu)成,含有 be 動(dòng)詞的句型,一般過去時(shí)表示過去時(shí)間內(nèi)某人某物存在的狀態(tài)，性質(zhì)等eg: I was a teacher last year. She(He) was a singer. We You were happy. They,一般現(xiàn)在時(shí)表示某人某物現(xiàn)在的狀態(tài)

8、，性質(zhì)等eg: I am a teacher now. She(He) is a singer. We They are happy. You,三. 一般現(xiàn)在時(shí)和一般過去時(shí)句型結(jié)構(gòu)的異與同,不含 be 動(dòng)詞的句型,一般現(xiàn)在時(shí)用來表示習(xí)慣性，經(jīng)常性發(fā)生的動(dòng)作 主語(yǔ)動(dòng)詞原形其它 主語(yǔ)(單三)動(dòng)詞現(xiàn)在式(+s)其它 eg: 1）I go to work by bus everyday 2）you watch TV everynight. 3）we play basketball on the weekends. 4）They have lessons everymoring.,一般過去時(shí)用來表示在過

9、去的時(shí)間里發(fā)生的動(dòng)作 主語(yǔ)動(dòng)詞過去式（+ed)其它 eg: 1）I went to work by bus yesterday. 2）you watched TV last night. 3）We played basketball last weekend. 4）They had lessons two days ago.,1) She _ (be) our English teacher. 2) Tom and Nike _ (be)my classmates. 3) I _ (be)a student. 4) You _ (be)a lovely girl. 5) They _ (be)

10、 my parents. 6) They _ (be) farmers two years ago. 7) Mike _ (be) a baby long long ago. 8) We _ (be) at home last night.,is,are,am,are,are,were,were,was,2. 用動(dòng)詞的適當(dāng)形式填空,10) He here yesterday. (be) 11) I up at 6:00 yesterday morning.(get) 12) you a good time last Sunday? (have),was,got,Did have,13) My

11、father often to work by bus last year.(go),14) I often to pop music 3 years ago. (listen),15) He usually in the pool in 2002. (swim),went,listened,swam,16) I _(be) ill last Sunday.,17) Amy _ (sit) here yesterday.,18) _ you _(clean) your room just now.,was,sat,Did clean,27) He _(be) here a moment ago.,19) My sister _ (be) born on June 5. 1996.,20) _ (be) your parents at home just now?,21) He _ (study) French here last year.,22) She _ (do) homework last night.,23) They _(go) to the zoo y