Perid 2 Listening & Grammar
Rescuing the lst astrnauts
Tw astrnauts, Liz and Gus, are lst n Planet X. Their captain Try is talking t them frm the mther ship.
A Listen t the captain’s instructins and help Liz and Gus label the map with the wrds frm the bx.
landing site
B. Listen t the recrding again and cmplete the ntes belw. Write ne wrd in each blank.
in tw days
leave mst things
five things
A Adverbial clauses f reasn
Adverbial clauses f reasn tell us why things happen. We usually use because, as and since t start adverbial clauses f reasn.
( Adverbial clauses f reasn)原因狀語從句通常用于說明事情發(fā)生的緣由，常見的引導(dǎo)原因狀語從句的從屬連詞有because, as, since等。
時態(tài)：原因狀語從句一般都是根據(jù)實(shí)際情況選用適當(dāng)?shù)臅r態(tài)。 通常是主過從過，主現(xiàn)從現(xiàn)。
具體來說：★because語氣最強(qiáng)，可以位于句首或句中，表示直接的原因，強(qiáng)調(diào)他人未知的事實(shí)?；卮饂hy提出的問題時，通常用because引導(dǎo)的句子來回答。如：
---Why d yu stp there, Eddie?---Because I have fund smething mre pleasant than art.
★ 表示明顯或已知的理由時，通常用as/since引導(dǎo)原因狀語從句，二者語氣比because弱。如：Yu dn’t have t see him tday as yu are t busy. 由于你太忙了，今天就沒必要去看他了。Since yu have finished yur wrk, yu can have a rest. 既然你已經(jīng)做完了你的工作，那就休息一下吧。
We can als put the adverbial clause f reasn after the main clause.
★because因為/since既然/as由于引導(dǎo)原因狀語從句時，既可以放句首，也可以放句中。
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.
Tm and Tina hid behind sme bushes as they heard sme vices speaking a strange language.
Tm ran away because an alien saw them and made a terrible nise.
Tm’s father refused t believe him since n ne else saw these aliens.
B because f
We can als use because f t give the reasn fr smething.
(1)because“因為”表示直接的原因或理由，語氣最強(qiáng)，通常放在主句之后，有時也放在主句之前。I stayed at hme because it rained.(2)回答why提出的問題，只能用because。 — Why didn’t yu call me last night? — Because I didn’t want t disturb yu. (3)because(因為)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.because引導(dǎo)的從句可用于強(qiáng)調(diào)句，其余不能。 It’s because he is kind that we like him. 2.because從句可用作表語(be動詞后)，其余不能。 This is because the earth is traveling arund the sun. 3.表示“……的原因是因為……”這一意義時，一般要用The reasn why…is that… The reasn why he cannt cme is that he is ill. 他不能來的原因是他生病了。
一般表示對方已知的、無須加以說明的既成事實(shí)的理由，全句中心在主句，語氣比because弱，常譯為“既然”。引導(dǎo)的從句常放在句首。
Since yu are free tday, yu had better help me with my math. 既然今天你休息，你最好幫我補(bǔ)習(xí)數(shù)學(xué)。
注意：since可用于省略句，而其它不能。如： Since s, there is n mre t be said.
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 引導(dǎo)的原因狀語從句時表示附帶說明的“雙方已知的原因”，語氣比since弱，較為正式，位置靈活（常置于主句前）。
As it is raining, yu’d better take a taxi. 既然在下雨， 你最好乘出租汽車。I went t bed early, as I was exhausted. 我睡得早， 因為我筋疲力盡了。
1. ______ yu are leaving tmrrw, we can eat dinner tgether tnight. A. Fr B. Since C. Befre D. While2. _____ the weather was fine, I pened all the windws. As B. Because f C. Fr D. With
1. because 意為__________2. because 語氣_______, 表示________（直接r間接）原因3. because 常用來回答__________引導(dǎo)的疑問句。4. because 常放在_______。
注：because不能與s連用。
since 意為____________________, 表示對方已知的事實(shí)或顯然的理由, 語氣比because_____, 引導(dǎo)的從句常放在_________。2. as 意為___________，表示明顯的原因或已知的事實(shí)，語氣比since _______, 引導(dǎo)的從句常放在________。
注：since與as用法大致相同, 且都不能與s連用。
用 because , since和as填空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.
如：I was late because the traffic was heavy. 因為交通擁擠，我遲到了。= I was late because f the heavy traffic.He?can’t?g?t?schl?because?f?illness.他因病不能上學(xué)。=?He?can’t?g?t?schl?because he is ill.
★有時because和because f可以相互轉(zhuǎn)換。
because; because f1. He walked slwly ___________ his bad leg. 2. _______ I dn’t cmplain, the manager thinks I’m pleased with their service.3. All flights have been put ff ___________ bad weather.
Write sentences abut the stry n page 99 by using because f.
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 ___________________________________________________ ___________________________________________________
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.

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