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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Lesson 8:,Why Are Plants Important?,I.Learning aims:,Master the new words and phrases:,pleasant,shade,basic,soil,II.Learning important and difficult points:,1)be made of/in/from/by,2)without,的用法,pleasant,shade,basic,soil,New Words,Which do you eat more,plants or meat?,Can we live without plants?,Why or why not?,What do people use plants for?,Think About It!,Lets Do It!,In a small group,make a list of the plants you eat everyday.What would happen to us if there were no plants?Try using this phrase:“If we had no plants,_.,Language,Points,without是介词，后面接名词或动名词，意为“没有；在没有的情况下，既可以放在句首也可以放在句尾。反义词是with。如：,In a word,we cant live without plants.,总之，我们离不开植物。,Without water,fish cant live.,没有水，鱼不能活着。,be made of,；,be made from,be made in,；,be made by,1 be made of意为“由制成，从制成品上能看出原材料来。如：,That chair is made of wood.,那把椅子是用木头做的。,(,从外表能看出是木头,),2 be made from意为“由制成，从制成品上看不出原材料。如：,The paper is made from wood.,纸是由木头做的。,(,从外表看不出木头,),辨析,3 be made in意为“在某地制成，in后面接地点。如：,This watch is made in China.,这只手表在中国制造。,4 be made by 意为“通过什么方式或者由某人制成。如：,The coat is made by hand.,衣服是手工做的。,Exercises,1.Many students use their computers _ games now.,A.play B.playing,C.to play D.played,2.I like listening to music very much.,_.,A.So do I B.So I do,C.So am I D.So I am,I.,单项选择。,C,A,3.Half of the milk in this store _ from Shandong.,A.comes B.come,C.have come D.are coming,4.How can I do my homework?I dont even have a pen _.,A.to make B.to make in,C.to write D.to write with,A,D,1.The Zhaozhou Bridge is made _ stone.,2.What did you come to school _?,3.People can get news _ many ways.,4.All the living things cant live _ air.,5.We can make this medicine _ plants.,II.,用适当的介词填空。,of,for,in,without,from,1.from,food,plants,comes,our,most,of,_.,2.medicine,sick,doctors,help,to,people,use,_.,3.a,made,you,straw,do,hat,of,have,_?,4.different,are,many,there,world,plants,in,eat,the,people,that,can,_.,III.,连词成句。,Most of our food comes from plants,Doctors use medicine to help sick people,Do you have a hat made of straw,There are many different plants in the world,that people can eat,Homework,Read the text after class,and try to recite it.,单元语法归纳,1.过去进行时的概念:表示过去某个具体时刻正在进行的事情或动作。,2.过去进行时的构成:主语+was/were+doing(现在分词)+其他,肯定句式为:主语+was/were+动词的现在分词+其他。如:,They were playing basketball at that time.,那时他们正在打篮球。,否认句式为:主语+was/were+not+动词的现在分词+其他。如:,They were not playing basketball at that time.,那时他们不在打篮球。,(,一,),过去进行时,一般疑问句式为,:Was/Were+,主语,+,动词的现在分词,+,其他,?,如,:,Were they playing basketball at that time?,那时他们正在打篮球吗,?,特殊疑问句式为,:,特殊疑问词,+was/were+,主语,+,动词的现在分词,+,其他,?,如,:,What were they doing at that time?,他们那时正在干什么,?,3.,与过去进行时连用的时间状语,:this morning,at that time,at this,time yesterday,the whole morning,all day yesterday,from nine,to ten last evening,when,while,等。,(二)情态动词must,1.表示“必须,此时可用于肯定句或疑问句,用于否认句时,mustnt的意,思是“一定不要“不能,而不表示“不必。如:,Must we finish the work tonight?,我们必须今晚完成这项工作吗?,must主要表示现在或将来,但在间接引语中也可表过去(=had to)。如:,She asked her boss if she must(had to)work overtime.,她请示老板她是否要加班。,对于must开头的一般疑问句,假设作否认答复,可以用neednt,不用,mustnt。如:,“Must I clean all the rooms?“No,you neednt.“这些房,间我都得清扫吗?“不必。,2.表示推测意为“准是“一定是,通常只用于肯定句。假设用于否认句或,疑问句,那么用can 代之。如:,The ground is wet.It must have rained last night.,地面湿了。昨晚一定下雨了。,That cant be Mr.Li.He has gone to Shanghai.,那一定不是李先生。他去了上海。,3.must与have to的区别,两者都表示“必须,但must侧重于说话者的主观看法,认为有必要或有,义务去做某事;have to 那么侧重于客观需要,含有“不得不“被迫之,意。如:Everyone must keep the law.人人都要守法。,The last bus has gone.Well have to walk home.,最后一班车已经开走了。我们不得不走着回家了。,一、单项选择,()1.Susan and Lily tomatoes and other vegetables on the,farm this time yesterday.(2021上海),A.pickB.are picking C.will pickD.were picking,()2.I saw him in the library yesterday.He a book at that,moment.(2021天津),A.readsB.is reading C.was readingD.will read,()3.When I got home,my son the music.,A.am listening toB.listened to,C.was listening toD.was listening,()4.We heard a cry when we TV last night.,()5.The traffic light is red.You cross the street until it,turns green.,A.cantB.neednt C.mustntD.may not,D,C,C,A,C,二、句型转换,6.Grandpa was mending his clock when I reached home.(改为一般疑问句),grandpa his clock when you reached home?,7.We were singing and dancing from 3 to 5 yesterday afternoon.(对画线部,分提问),you singing and dancing?,8.Must I finish my work by tomorrow?(作否认答复),.,9.The students were talking about the news when the teacher came in.(改,为否认句),The students about the news when the,teacher came in.,10.The woman must be Mrs.Brown,?(完成反意疑问句),Was,mending,When,were,No,you needn,t,were,not,talking,isn,t,she,句型转换,1.The old man is so old that he cant look after himself.(,改为同,义句,),The old man is,old,look after himself.,2.My father lay in the bed just now.(,用,at this time yesterday,改写,句子,),My father,in the bed at this time yesterday.,3.I like going shopping better than staying at home.(,改为同义句,),I,shopping,at home.,【,教师备用,】,too,to,was,lying,prefer,going,to,staying,易错提醒:,1.so.that.意为“如此以至于,当that后从句是否认句时,可以与too.to互换。,2.at this time yesterday 与过去进行时态连用。过去进行时态的结构为:主语+was/were+v.-ing+其他。,3.prefer doing to doing 意为“比起更喜欢,可以和lik
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