2020-2021学年Unit 1 Science Fiction评课课件ppt

这是一份2020-2021学年Unit 1 Science Fiction评课课件ppt，共31页。PPT课件主要包含了走近新课 一起感知，语法感知，语法探究 一起思考，词汇讲解，presumed　，to be，that　，语法讲解，知识脉络 ，语法精讲 等内容，欢迎下载使用。
写出下列句子中被动语态的种类1.Next,the Chinese character Fu was attached upside dwn t ur frnt dr.     2.It is believed that when Fu is put upside dwn,happiness arrives.     3.The last time I went back t my hmetwn,a big pwer statin was being built there.    
一般过去时的被动语态
一般现在时的被动语态
过去进行时的被动语态
4.Eight nvels have been written by this yung girl up t nw.     5.Mre wrk shuld be dne t prtect the envirnment.    
现在完成时的被动语态
含情态动词的被动语态
1.Whever is charged with a crime shuld be presumed inncent until prven therwise.(Page 4)任何被指控犯罪的人应该在被证明有罪前假定为无罪。★presume vt.& vi.假设;假定I presumed that he understd the rules.我想他明白这些规则。
【合作探究】 读一读·细观察　阅读下列句子,写出句中黑体部分的句型、结构、词性和含义①Little is knwn f the yungest sn;it is presumed that he died yung.句型 It is presumed that...　含义 据推测…… ②We must presume them t be inncent until we have prf f guilt.结构 be...　含义 假定……是…… ③There is a general presumptin that the dctr knws best.词性 名词　含义 可能的事;假定
说一说·勤归纳　presume vt.& vi.假设;假定It is presumed that...据推测…… be...假定……是……presumptin n.可能的事;假定
【即学即用】 单句语法填空①It is 　　　　　　 (presume) that walking des gd t ur health. ②I had t make a 　　　　　　　　(presume) since I knew nthing abut the case. ③Let’s presume him 　　　　　　(be) hnest befre having a discussin. 
presumptin　
完成句子④据推测,大声读英语有利于提高我们的口语水平。　　　　　　　　　　　reading English alud will be helpful t imprve ur ral English. ⑤我们可以先假定他的理论是正确的。We can 　　　　　　　　　　　　　　　　.
It is presumed that
presume his thery t be right
2.They believe if AI can handle tasks like calculating and driving fr us,we will have mre time fr creating,thinking,and “being human”.(Page 4)他们认为,如果人工智能能够处理像是计算和为我们开车这些任务,我们将会有更多的时间来创作、思考和“做人”。
★calculate vt.计算;核算;预测Benefit is calculated n the basis f average weekly earnings.补助金按平均周收入计算。【高考典句】 (2019·天津高考)She calculated that ging t a stranger’s huse was a risky mve,but she decided t take the chance.她预料去一个陌生人的家是一个有风险的行为,但是她决定去冒险。
【合作探究】 读一读·细观察　阅读下列句子,写出句中黑体部分的句型、词性和含义①It is calculated that at least 47,000 jbs were lst last year.句型 It is calculated that...　含义 据估算…… ②It turned ut that the persn was a cld and calculating killer.词性 形容词　含义 精于计算的③Our guess was cnfirmed by calculatin.词性 名词　含义 计算
说一说·勤归纳　calculate vt.计算;核算;预测It is calculated that...据估算……calculating adj.精于计算的calculatin n.计算
【即学即用】 单句语法填空①It is calculated 　　　　　in 1997 alne,abut 2.3 millin peple died f that disease. 完成句子②老师计算了全班的平均分。The teacher 　　　　　　　　　　　　　　　　　　　　　　　　. 
calculated the average mark f the whle class
③这幅画很珍贵,很难估计它的价格。The painting is s valuable that it is difficult 　　　　　　　　　　　　. ④从他的话语中,我们可以确定他母亲是个精于计算的人。Frm his wrds we culd tell that his mther was 　　　　　　　　　　. 
t calculate its price
a calculating wman
被动语态一、被动语态概述语态是动词的一种形式,用来说明主语和谓语动词之间的关系。英语动词有两种语态:主动语态和被动语态。主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者。一般说来,只有及物动词才有被动语态。
二、各种时态的被动语态的构成被动语态由“be+动词过去分词”构成。人称、数和时态的变化是通过be的变化体现的。几种常用时态的被动语态构成如下:一般现在时:am/is/are+动词过去分词一般过去时:was/were+动词过去分词一般将来时:will/shall be+动词过去分词或am/is/are ging t be+动词过去分词现在进行时:am/is/are being+动词过去分词过去进行时:was/were being+动词过去分词现在完成时:have/has been+动词过去分词过去完成时:had been+动词过去分词
English is taught in mst schls.大多数学校都开设英语课。Their wedding was held in their hmetwn.他们的婚礼是在他们家乡举行的。 D yu think the bk will be reprinted?你觉得这本书会重印吗?He knew he wuld be punished fr it.他知道自己会为此受到惩罚。注意 含有情态动词的被动语态:情态动词+be+动词过去分词。Such wrk can be dne in an hur r s.这样的工作可以在一个小时左右做完。
三、主动语态变为被动语态的方法1.把主动语态的宾语变为被动语态的主语。2.把谓语变成被动结构,时态不变。3.有时把主动语态中的主语放在介词by之后做宾语,原做主语的人称代词要用宾格。All the peple laughed at him.→He was laughed at (by all the peple).They were building the new bridge.→The new bridge was being built (by them).We haven’t tld her abut it yet.→She hasn’t been tld abut it yet (by us).
四、使用被动语态的场合1.不知道或没有必要指出谁是动作的执行者时。The bridge was built last year.这座桥是去年建造的。2.当更加强调动作的承受者时,动作的执行者由by引导置于谓语动词之后,不需要时可以省略。The rm hasn’t been cleaned yet.房间还没有被打扫。
3.当动作的执行者不是人时,多用被动语态。The whle village has been washed away by the fld.整个村庄都被洪水冲走了。
五、主动形式表示被动意义的几种常见情况1.某些连系动词,如lk,sund,smell,feel,taste,prve要用主动形式表示被动意义。The garden lks very beautiful.这个花园看上去很美。2.某些与can’t,wn’t等连用的不及物动词,如mve,lck,shut,pen等。The dr wn’t shut.这门关不上。
3.某些可和well,easily等副词连用的不及物动词,如read,wash,clean,ck。The clth washes well.这种布料好洗。
【即学即用】 把下列句子变成被动语态①The citizens in this city use a great deal f water every day.→A great deal f water 　　　　　　every day by the citizens in this city. ②Yu shuld pay mre attentin t yur table manners.→Yur table manners .
shuld be paid mre attentin t
③He gave her sme mney when he knew that she was in truble.→She 　　　　　　　　　　　　　　　　　when he knew that she was in truble. ④The by was making a kite when I saw him yesterday.→A kite 　　 　　 when I saw him yesterday.⑤The yung man has translated three nvels up t nw.→Three nvels 　　　　　　　　　　　　　　　　　　　up t nw. 
was given sme mney by him
was being made by the by
have been translated by the yung man
一、单句语法填空1.As we all knw,Chinese 　　　　　　　　(speak) by many peple utside China. 答案:is spken2.He tld me that the matter 　　　　　　　　　(lk) int by the plice then. 答案:was being lked3.Just a little patience!The prgram 　　　　　　　　　(bradcast) next Sunday. 答案:will be bradcast
4.Yur hmewrk shuld 　　　　　　　　　(finish) as sn as pssible. 答案:be finished5.When I gt there,all the windws 　　　　　　　　　　(clean) already. 答案:had been cleaned6.The yung trees 　　　　　　　　　　(water) by the ld man twice a week. 答案:are watered7.The girl cmplained that the new text was hard 　　　　　(understand). 答案:t understand
二、翻译句子1.It is reprted that mre than 20 peple have been saved s far.答案:据报道,到目前为止20多人获救了。2.When I arrived,the pictures were being drawn by the girls.答案:我到达时,女孩们正在画那些画。3.He said that all the apples had been bught by an ld man.答案:他说所有的苹果都被一位老人买走了。