選修9 Unit 4 Exploring plants詞匯教學(xué)

1、postpone【語境展示】閱讀下列句子，并試著歸納postpone的意思及用法。1. bad weather forced us to postpone fridays game.2. weve had to postpone going to france because the children are ill.3. they decided to postpone their holiday until next year.【自我歸納】postpone 是動詞，意為“延遲，延期，暫緩”，可直接跟_ 或動詞-ing 形式作賓語（句1、句2），也常與until連用（句3）?！炯磳W(xué)即練】翻譯

2、下列句子。1. 這場比賽已經(jīng)三度延期了。2. 讓我們在獲得更多情報之后再做決定也不遲。3. 我們將不得不把會議推遲到下周舉行。key：【自我歸納】名詞【即學(xué)即練】1. the game has already been postponed three times.2. lets postpone making a decision until we have more information.1. well have to postpone the meeting until next week.rot【語境展示】閱讀下列句子，并試著歸納rot的意思及用法。1. candy will rot

3、your teeth.2. the trees were cut and left to rot.3. the window frame had rotted away completely.4. a mans mind can rot in prison.5. the wood must not get damp as rot can quickly result.6. the team has enough good players to stop the rot.7. it was after he left the company that the rot set in.【自我歸納】r

4、ot既可作動詞也可作名詞。rot 作動詞時，意為：_（常用搭配為rot away）（句1-句3）；腐化，墮落（句4）。rot 作名詞時，意為： 腐爛，腐敗變質(zhì)（句5）；形勢惡化，腐化，墮落（常 用搭配為stop the rot, the rot set in）（句6、句7）。【拓展】rotten adj.意為：腐敗的，腐爛的，腐朽的；惡劣的，非常糟糕的； 不舒服，不適。如：the apples went rotten very quickly.the film was pretty rotten.im not getting up. i feel really rotten.【即學(xué)即練】根據(jù)漢

5、語意思補全下列句子。1. 棚屋已塌陷，木頭在腐爛。the shed had already fallen in, and_.2. 我們下定決心要制止社會上的腐敗現(xiàn)象。we are determined to _.3. 這些香蕉一星期后會腐爛。these bananas _.key:【自我歸納】（使）腐爛，腐敗變質(zhì)【即學(xué)即練】1. the wood was rotting away2. stop the rot in our society3. will rot / go rotten in a weekevolve【語境展示】閱讀下列句子，并試著歸納evolve 的意思及用法。1. the s

6、chool has evolved its own style of teaching.2. popular music evolved from folk songs.3. the company has evolved over the years into a major chemical manufacturer.4. fish evolved from prehistoric sea creatures.5. the dolphin has evolved a highly developed jaw (下頜).【自我歸納】evolve 是動詞，意為：（使）逐漸形成，逐步發(fā)展，逐漸

7、演變（常與介詞from 或_連用）（句1-句3）；進(jìn)化，進(jìn)化形成 （常與介詞from連用）（句4、句5）?！炯磳W(xué)即練】根據(jù)漢語意思補全下列句子。1. these plants _ ( 進(jìn)化了數(shù)百萬年).2. this research project _ (從一個概念發(fā)展而來) first proposed in 1987.3. it _ (從一種野草進(jìn)化而來).key:【自我歸納】into【即學(xué)即練】1. evolved for millions of years2. evolved from a concept3. evolved from a wild grassdate back to

8、【歸納】date back to 意為“追溯到，遠(yuǎn)在年代”，在句中作謂語時，常 用一般現(xiàn)在時，通常不用被動語態(tài)。如：our partnership dates back to 1960.【拓展】date back 意為“追溯到，始于，自至今”。如：the custom dates back hundreds of years.date from 意為“從的時候就存在，追溯到，開始于”，與 date back to 用 法一樣。如：the church dates from the 13th century.【即學(xué)即練】根據(jù)漢語意思補全下面句子。1. 這個古老的傳統(tǒng)可以追溯到幾個世紀(jì)前。_several centuries.2