英语必修 第三册Unit 3 The world of science课文配套课件ppt

这是一份英语必修 第三册Unit 3 The world of science课文配套课件ppt，共17页。PPT课件主要包含了◆原句再现，◆ 考点训练，● 选出最佳选项等内容，欢迎下载使用。

本单元引入一个新的重要语法内容——现在完成时的被动语态这一内容同样也是高考的重点和热点，请看教材原句
1. I guess yu have been asked abut the title f yur bk befre.2. New inventins like 3D printers have been used t make replacement hearts and bne parts.3. Nthing like this has been invented yet…4. In additin, imprtant advances have been made in ….5. I’ve als been tld that yu are an inventr yurself…6. …The new Age f Inventin has just been published.
1. My watch has just been repaired.2. The weather has been cld this winter s damaged buildings have already been rebuilt recently.4. All the children have already been taken care f in the village.5. She has been taken t the hspital.6. They have been admitted int the key university.
◆ 现在完成时被动语态的四种句式：肯定式; 否定式; 一般疑问式; 特殊疑问式
◆ 现在完成时被动语态的基本结构：have/has been dne.句子主语为复数时，使用have been dne; 句子主语为单数时，使用has been dne. 请观察以下句子
※ 肯定式:主语 +have/has +been+及物动词的过去分词+其他※ 否定式:主语 +have/has + nt + been + 及物动词的过去分词+其他.※ 一般疑问式: Have/Has+主语+been+及物动词的过去分词+其他※ 特殊疑问式:特殊疑问词(组)+have/has+主语+been+及物动词的过去分词+其他请观察以下句子
1.This bk has already been translated int French.2. We haven’t been tld the date f the meeting s far.3. Has the machine been repaired yet?4. Hw many years has the cmputer used till nw?5. Hw have these prblems been slved?
◆ 现在完成时被动语态的含义
※ 动作已完成，强调对现在造成的影响或结果※ 主语和谓语动词之间为被动关系请观察以下句子
a. Yur rm has been cleaned, s yu needn’t clean it nw.(clean 动作已经完成, 而且 rm 与 clean 之间为被动关系)b. These vegetables have been watered, s we can g hme.(water动作已经完成, 而且 vegetables 与 water 之间为被动关系)c. The prblem has just been slved by ur teacher. (slve动作已经完成, 而且 prblem 与 slve之间为被动关系)d. All the rice in the bwl has been eaten up.(eat动作已经完成, 而且 rice 与 eat之间为被动关系)
◆ 现在完成时的被动语态的主要用法
●表示过去一个被动的动作或状态,一直持续到现在,并有可能持续下去,常与 fr, ver, in the past … years或 since引导的时间状语连用,或常见于“Hw ”句型中。请观察以下句子
a. The film has been shwn fr almst three hurs.b. The car has been used in the past twelve years.(比较：The car was used in the past. )c. These issues have been discussed ver these days.d. The wrkers have been trapped since last week.e. Everything has been changed since 1990.f. The ld man has been taken gd care f since he lived here.
●表示过去发生的动作对现在造成的影响与结果,常与 already, yet,just, never, recently, befre 等副词连用，请观察以下句子
a. I'm srry, but the letters haven't been typed yet.(结果是：现在还拿不到这些信件)b. The wrk has already been finished.(结果是：现在不用做这项工作了)c. The classrm has just been cleaned.(结果是：现在不用再打扫了)d. They have never been praised by their teacher.(结果是：目前还没被表扬)
●常与 “到目前为止”的状语连用，如： s far, up t nw, until nw,up till nw 等, 请观察以下句子
a. All the clthes have been shwn fr three days s far.b. Up t nw, the task hasn’t been cmpleted.c. The museum has been visited up till nw.d. Until nw, these bks in English have been kept there.
● 在 “ It/That/This is the first…time that 从句”中, 从句中的谓语用现在完成时或现在完成时的被动式，请观察以下句子
It/This is the third time that the mvie has been shwn this year.b. It is the first time that the girl has been punished by her father.
◆现在完成时的主动语态变被动语态
●只带一个宾语的动词变为被动语态时，将主动语态的宾语变为被动语态的主语即可，请观察以下句子
a. We have built many huses in the past ten years. (主动)→ Many huses have been built in the past ten years. (被动)b. He has made three plane mdels s far. (主动)→ Three plane mdels has been made s far. (被动)
●带有双宾语的动词,如 give, send, bring, take, teach, shw, tell, sell, make, sing, write, read, buy, pay, lend, pass, prmise等变为被动语态时,可将其中一个宾语变为主语,另一个保留不动,请观察以下句子
a. We have given him the bk. (主动)b. He has been given the bk. (被动)c. The bk has been given t him. (被动)
●带有复合宾语的动词变为被动语态时,只能将宾语变为主语,原来的宾语补足语成为主语补足语。原来省略 t的不定式作宾语补足语的,被动语态中要用带 t的不定式, 请观察以下句子
a. I have made my brther d cleaning. (主动)→ My brther has been made t d cleaning. (被动)b. We have helped them g thrugh the difficulty. (被动)→ They have been helped t g thrugh the difficulty. (被动)c. The bss has tld them t g t the cmpany at nce. (主动)→They have been tld t g t the cmpany at nce. (被动)
●短语动词是一个不可分割的整体，在现在完成时主动语态变为被动语态时，一般要保持短语的完整性，不可省略短语动词中的介词或副词，请观察以下句子
a. All f the students have referred t the dictinary. →The dictinary has been referred t. b. These vlunteers have taken gd care f the three ld men.→ The three ld men have been taken gd care f.c. It is said that the plice have lked int the accident.→ It is said that the prblem has been lked int. d. The girl has thught f the exciting stry.→ The exciting stry has been thught f.
1. -- Flight 302 t Lndn ________ until 7:30 tmrrw mrning. -- N wnder I hear s many cmplaints frm the passengers.A. has been delayed  B. delay  C. delayed  D. will be delayed2. -- The windw is dirty. -- I knw. It ____ fr  weeks. hasn't clean    B. didn't clean   C. wasn't cleaned    D. hasn't been cleaned3.Every year many farmers arrive in Shenzhen fr the mney-making jbs they _______  befre leaving their hmetwns.prmised    B. were prmised   C. have prmised    D. have been prmised
4. -- _____David and Vicky _____ married?  -- Fr abut three years.A. Hw lng were; being           B. Hw lng have; gtC. Hw lng have; been            D. Hw lng did; get5. Millins f punds f damage _____ by a strm which swept acrssthe nrth f England last night. A. has been caused   B. had been causedC. will be caused              D. will have been caused6. --We want t sit at the table near the windw. -- I’m srry, but it _______ already.A. has taken   B. tk    C. was taken   D. has been taken7 .-- ______the letter _____t Mr. .Black? --N. It’s still n the desk.A. Has; given  B. Will; be given   C. Was ; given  D. Has ;been given
9. S far, mn ______ by man already.A. is visited   B .will be visited   C. has been visited  D. was visited10.With the help f high technlgy, mre new substances _____in the past years.A. discvered                    B. have discveredC. had been discvered    D. have been discvered11. I gt caught in the rain and my suit _______.A has ruined  B had ruined  C has been ruined D  had been ruined12 .When and where t g fr the n-salary hliday _______ yet.A.  are nt decided      B. have nt been decidedC.  is nt being decided  D. has nt been decided
1. Every pssible means ______________________(try) t stp the bad behavir, but they dn't wrk at all.2. Over the past ten years, this twn _____________________ (hit) by earthquakes.3. All the preparatins fr the task _____________________________(cmplete), and we are ready t des the lake smell terrible?--Because large quantities f water _____________________(pllute) machine is wrking again!--Yes, it brke dwn yesterday, but it _______________________ (fix).
● 填入括号内动词的适当形式
has been tried
has been hit
have been cmpleted
have been plluted
has been fixed