初中英语沪教牛津版（2024）八年级下册Module4 DiscoveryUnit 7 The unknown world优质课件ppt

这是一份初中英语沪教牛津版（2024）八年级下册Module4 DiscoveryUnit 7 The unknown world优质课件ppt，文件包含沪教牛津版六三制英语八下Unit7《Theunknownworld》第3课时Grammar课件pptx、沪教牛津版六三制英语八下Unit7《Theunknownworld》第3课时Grammar教案doc、沪教牛津版六三制英语八下Unit7《Theunknownworld》第3课时Grammar分层练习含答案doc等3份课件配套教学资源，其中PPT共38页， 欢迎下载使用。
Learning bjects
1. 掌握because, since和as引导原因状语从句的用法；2. 能够在具体语境中正确使用原因状语从句；3. 通过归纳等方法感知并运用原因状语从句，谈论未知世界。
Let’s lk and chse
Chinese ______ are heres because they wrk hard withut ______.Sme kids are ______ f ______ as they are strange______.Since they kept ______ in the______, the rbber didn’t ______ them.
quiet B. frightened C. astrnauts D. bushes E. aliens F. fear G. discver H. creatures
C F B EH A D G
Chinese astrnauts are heres because they wrk hard withut fear.Sme kids are frightened f aliens as they are strange creatures.Since they kept quiet in the bushes, the rbber didn’t discver them.
Read and pay attentin t the parts in red.
Adverbial clauses f reasn原因状语从句
Presentatin
( Adverbial clauses f reasn)原因状语从句通常用于说明事情发生的缘由，常见的引导原因状语从句的从属连词有because, as和since等。
1. I’m sure smething landed in the frest near the hills as I heard a lud nise last all like her as she is kind.3. Since n ne else saw these aliens, I refuse t believe yu.4. Since everyne is here, let’s start.5. He failed the exam because he didn’t wrk hard.6. I stayed at hme because it rained.
Underline the adverbial clauses f reasn and pay attentin t the wrds in red.
Adverbial clauses
Adverbial clauses f reasn tell us why things happen. We usually use because, as and since t start adverbial clauses f reasn.
I'm sure smething landed in the frest near the hills as | heard alud nise last night.
(1)because“因为”表示直接的原因或理由，强调他人未知的事实。 语气最强，通常放在主句之后，有时也放在主句之前。I stayed at hme because it rained.(2)回答why提出的问题，只能用because。 — Why didn’t yu call me last night? — Because I didn’t want t disturb yu. (3)because(因为)和s(所以)不能一起使用。Because it was raining, we stayed at hme.=It was raining , s we stayed at hme.
1. I hate travelling by air _____ yu usually have t wait fr hurs befre the plane takes ff. ( 上海市) A. because B. thugh C. until D. unless2. — _____ is the street crwded with s many peple? — Because they are waiting t watch the bat races. ( 湖北宜昌) A. Why B. Where C. Hw D. Wh
表示明显或已知的理由时，通常用as/since引导原因状语从句，二者语气比because弱。如：Yu dn’t have t see him tday as yu are t busy. 由于你太忙了，今天就没必要去看他了。Since yu have finished yur wrk, yu can have a rest. 既然你已经做完了你的工作，那就休息一下吧。
一般表示对方已知的、无须加以说明的既成事实的理由，全句中心在主句，语气比because弱，常译为“既然”。引导的从句常放在句首。
Since yu are free tday, yu had better help me with my math. 既然今天你休息， 你最好帮我补习数学。
1. _______ he takes exercise every day, ______ he is very healthy. A. Because; s B. Althugh; but C. Because; / D. Althugh; /2. — What shall we d this afternn? — _____ it’s very cld, let’s stay at hme. A. While B. Since C. Until D. After
as 引导的原因状语从句时表示附带说明的“双方已知的原因”，语气比since弱，较为正式，位置灵活（常置于主句前）。
As it is raining, yu’d better take a taxi. 既然在下雨， 你最好乘出租汽车。I went t bed early, as I was exhausted. 我睡得早， 因为我筋疲力尽了。
1. ______ yu are leaving tmrrw, we can eat dinner tgether B. Since C. Befre D. Whil2. _____ the weather was fine, I pened all the windws. As B. Because f C. Fr D. With
n ne saw else thse aliens,
I refuse t believe yu.
Adverbial clauses
When we put the adverbial clause f reasn at the beginning f the sentence, we ften separate it frm the main clause with a cmma (,).
We can als put the adverbial clause f reasn after the main clause.
n ne saw else thse aliens.
I refuse t believe yu
because(因为)/since (既然)/as (由于)引导原因状语从句时，既可以放句首，也可以放句中。
1)I didn’t g because I was afraid. = Because I was afraid, I didn’t g.2) Yu dn’t have t see him tday as yu are t busy. =As yu are t busy, yu dn’t have t see him tday.3) Yu can have a rest since yu have finished yur wrk.=Since yu have finished yur wrk, yu can have a rest.
The plice fficer asked Tm sme mre questins abut the aliens. Match the questins with the answers. Then use them t cmplete the plice fficer’s ntes with as, since r because.
1 Why was Tina sure that smething landed in the fres near the hills?2 Why did yu and Tina hide behind sme bushes?3 Why did yu run away?4 Why did yur father refuse t believe yu?
a We heard sme vices speaking a strange language.b She heard a lud nise last night.c N ne else saw these aliens. d An alien saw us and made a terrible nise.
Tina and I hid behind sme bushes as we heard sme vices speaking a strange language.
Because an alien saw us and made a terrible nise, we ran away.
Since n ne else saw these aliens, ur father refused t believe us.
Tina was sure that smething landed in the frests
near the hills because she heard a lud nise last night.
Let’s cmplete
1. because 意为__________2. because 语气_______, 表示_________ （直接r间接）原因3. because 常用来回答__________引导的疑问句。4. because 常放在_______。
注：because不能与s连用。
5. since 意为___________________, 表示对方已知的事实或显然的理由, 语气比because_____,引导的从句常放在_________。6. as 意为___________，表示明显的原因或已知的事实，语气比since _______, 引导的从句常放在________。
注：since与as用法大致相同,且都不能与s连用。
Sum and make sentences
用because, since和as填空1. I didn’t g t schl yesterday ________ I was ill.2. ________ everybdy is here, let’s begin ur meeting.3. ________ yu are in pr health, yu shuld nt stay up late.4. I asked her t stay nearby __________ I had smething t tell her.5. ________ all the passengers are here, why dn’t we start at nce.6. Bill wn’t make any prgress __________ he desn’t study harder than befre.
1) Mr Wang tld us t leave schl at 2:30 p.m. The strm was cming. 2) Everyne was running quickly in the street. That was the last bus. 3) I cannt get int the flat. I frgt t bring my keys. 4) We had t change ur clthes. We were all wet frm the strm. 5) I left my Chinese textbk at schl. I was in a hurry.
Cmbine the fllwing sentences using because, as r since.
Mr Wang tld us t leave schl at 2:30 p.m. because/as/since the strm was cming.
Everyne was running quickly in the street because/as/since that was the last bus.
I cannt get int the flat because/as/since I frgt t bring my keys.
We had t change ur clthes because/as/since we were all wet frm the strm.
I left my Chinese textbk at schl because/as/since I was in a hurry.
6) I went t bed early. I felt quite tired tday. 7) Simn was nt able t slve the prblem. It was t difficult.8) I did nt g t Tm’s birthday party. I was nt invited.
I went t bed early because/as/since I felt quite tired tday.
Simn was nt able t slve the prblem because/as/since it was t difficult.
I did nt g t Tm’s birthday party because/as/since I was nt invited.
We can als use because f t give the reasn fr smething.
I'm unhappy because f yur marks in the exam!
Read the fllwing sentences and find the difference.
Tim didn’t g t schl yesterday because he was ill.
Tim didn’t g t schl yesterday because f his illness.
Read and sum.
1 Tina was surprised/the yellw light in the sky_______________________________________________________________2 The aliens landed n this planet/an accident_______________________________________________________________3 The children ran away frm the frest/the aliens_______________________________________________________________4 Their dad was nt sure abut the children's stry/the writing n the piece f paper______________________________________________________________________________________________________________________________
Write sentences abut the stry n page 99 using because f.
Tina was surprised because f the yellw light in the sky.
The aliens landed n this planet because f an accident.
The children ran away frm the frest because f the aliens.
Their dad was nt sure abut the children’s stry because f the writing n the piece f paper.
Adverbial clauses f reasn tell us why things happen. We usually use because, as and since t start adverbial clauses f reasn.
We can als put the adverbial clause f reasn f reasn after the main clause.
Ⅰ. 单项选择(　　)1. ________ Jane was the eldest, she lked after the thers. A. ThughB. IfC. As(　　)2. ________ yu knw it, I wn’t say it again. A. SinceB. AlthughC. Maybe(　　)3. He didn’t hear the knck at the dr ________ he was listening t the radi. A. sinceB. asC. because(　　)4. —Why didn’t yu cme?—________ my mther was ill. I have t take care f her. A. UnlessB. BecauseC. If
(　　)5. ________ yu are tired, yu had better rest. A. AsB. WhyC. Befre(　　)6. I d it ________ I like it. A. whyB. becauseC. thugh(　　)7. ________ yu are free tday, yu can help yur mther with the husewrk. A. SinceB. AfterC. Until(　　)8. ________ yu’ve gt a chance, yu shuld make gd use f it. A. UnlessB. SinceC. Althugh
II. 根据句意，从括号中选择合适的词填空1. ____________(Because/ Because f)Tmmy frgt t save the file, he had t type it again. 2. ____________(Since/Because f)everyne is here, why dn’t we start ur meeting at nce?3. He failed in the exam ____________(because f/ since)his careless. 4. ____________(Because f /As)he was in a hurry, Jack left his bag hme.
Wrk in grupsD yu like stries/mvies abut aliens? Why r why nt?What stries/mvies wuld yu like t create? Share with sme details.
1. Make a mind map abut adverbial clauses f reasn (rules+examples).2. Search fr sme news/stries abut unknwn wrld and share.
对未知的恐惧永远不会消失，因为未知无限向外扩张，让你可怜兮兮地依附于任何已知的小庇护所: 一块饼干含有12卡路里，皮肤被割后会流血。”―卡洛琳 · 凯特韦尔（美国著名的旅游作家，《国家地理探险》专栏作家）
The fear f an unknwn never reslves, because the unknwn expands infinitely utward, leaving yu t cling pitifully t any small shelter f the knwn: a cracker has twelve calries; the skin, when cut, bleeds.”― Carline Kettlewell