Unit 4 Then and nowPart 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 great time. After school, I often went to the park and read under a tree. It was so beautiful there.123Storytimeeat raw meat吃生肉吃生肉做饭做饭cook their foodhelp you cookhouse robots帮你做饭帮你做饭家务机器人家务机器人wash the dishes洗碗洗盘子洗碗洗盘子cook their meat煮肉煮肉do the dishes洗碗洗盘子洗碗洗盘子many clean riversmore and more buildingshelp the earthDont worry!How beautiful the world was!live on the earth住在地球上住在地球上住在大海里住在大海里live in the seahave a bright futureheal the world有广阔的前景有广阔的前景拯救世界拯救世界Make it a better place!让它变成更好的世界！让它变成更好的世界！eatmeetdishesmorehumansliveseehad1.ate（原形原形）_ 2. meat(同音词同音词)_3. dish（复数复数）_ 4. many（比较级比较级）_5. human(过去式过去式) _ 6. lived (原形原形)_7. sea(同音词同音词) _ 8. have(过去式过去式)_9. better(原级原级) _ 10. caveman(复数复数)_ P41goodcavemenI . They cooked their food.( 否定句）否定句）2. There were many trees. (一般疑问句）一般疑问句）3. We should help the earth. (一般疑问句）一般疑问句）4. Whales lived in the sea. ( 否定句）否定句）They didnt cook their food. Were there many trees?Should you help the earth?Whales 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. 3. 结构结构1. 概念概念2.时间时间主语主语 + 动词的过去式动词的过去式 + 其它其它yesterday (morning )last (year, week, night, month)in 1990 (过去的年过去的年)two days agothe day before yesterdayjust now = a moment ago nowpastfuture表示表示过去某个时间过去某个时间发生的动作或存在的状态发生的动作或存在的状态一. 规则动词 look looked1）一般在动词原形末尾加）一般在动词原形末尾加 ed play played start started2）结尾是）结尾是 e 的动词只加的动词只加 - d live lived hope hoped use used3）末尾只有一个辅音字母的）末尾只有一个辅音字母的 重读闭音节词，重读闭音节词，先双先双写这写这 个辅音字母，再加个辅音字母，再加ed stop stoppedplan plannedtrip tripped4）结尾是）结尾是“辅音字母辅音字母+y”的词，的词， 先变先变“y”为为“i”再加再加ed study studiedcarry carried含有含有be动词的句型动词的句型一般过去时表示一般过去时表示过去时间过去时间内内某人某物存在的状态，某人某物存在的状态，性质等性质等eg:I was a teacher last year. She(He) was a singer.WeYou were happy.They一般现在时表示某人某物一般现在时表示某人某物现在的现在的状态，性质等状态，性质等eg: I am a teacher now. She(He) is a singer. We They are happy. You不含不含be动词的句型动词的句型一般现在时用来表示习惯性，经常习惯性，经常性性发生的动作 主语主语动词原形动词原形其它其它 主语主语(单三单三)动词现在式动词现在式(+s)其它其它eg:1）I go to work by bus everyday2）you watch TV everynight.3）we play basketball on the weekends.4）They have lessons everymoring.一般过去时用来表示在过去的时过去的时间间里发生的动作 主语主语动词过去式（动词过去式（+ed)其它其它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) my parents.6) They _ (be) farmers two years ago.7) Mike _ (be) a baby long long ago.8) We _ (be) at home last night.isareamarearewerewerewas2. 用动词的适当形式填空10) He here yesterday. (be) 11) I up at 6:00 yesterday morning.(get)12) you a good time last Sunday? (have) was gotDid have13) My 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 swam16) I _(be) ill last Sunday.17) Amy _ (sit) here yesterday.18) _ you _(clean) your room just now.wassatDid clean27) 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 yesterday morning.24) We _ (have) a party last Saturday.26) They _ (live) here two years ago.25) Joy _ (visit) me yesterday evening.wasWere studieddidwenthadvisitedlivedwas