原因状语从句

状语从句分类

表示原因表示结果表示目的表示比较表示条件2021/5/91一:原因状语从句定义：如果从句表达的是主句行为的原因，就构成原因状语从句。引导词：because,since,as,for2021/5/92关于becausebecause表示的原因是必然的因果关系，语气最强，通常放在主句之后，有时也放在主句之前。

YouwanttoknowwhyIamleaving?IamleavingbecauseIamtired.(2)回答why提出的问题，只能用because,

不能用其余三者。

A：Whycan’tIgo?

B：Becauseyouaretooyoung.2021/5/93(3)because从句可用作表语，其余不能。

Thisisbecausetheearthistravellingaroundthesun.(4)表示“……的原因是因为……”这一意义时，一般要用Thereasonwhy…isthat…如：Thereasonwhyhecannotcomeisthatheisill.2021/5/94because后跟句子Iwaslateforschoolbecause

Igotuplate.becauseof

后跟名词Wedidn’tgotothecinemabecauseoftherain.2021/5/95关于sincesince引导的原因状语从句一般放于主句之前,表示已知的、显然的理由(通常被翻译成“既然”)，较为正式,语气比because弱。

Sinceyouarefreetoday,youhadbetterhelpmewithmymaths.既然今天你休息，你最好帮我补习数学。2021/5/96

关于as

as

引导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，位置较为灵活(常放于主句之前)。

Asitisraining,you’dbettertakeataxi.

既然在下雨，你最好乘出租汽车。

Iwenttobedearly,asIwasverytired.

我睡得早，因为我筋疲力尽了。2021/5/97For“因为,由于”表明附加或推断的理由，引导的分句前常有逗号。for分句不放句首.

Itrainedlastnight,forthegroundiswetthismorning.2021/5/98注意：汉语习惯上说“因为……所以”，但英语却不能将because,since,as,for等与so(所以)连用。2021/5/99二：结果状语从句

定义：表示由某个行为而导致的结果引导词：soso...that，such...that

2021/5/910So因此It’sgoingtorain,sotakeanumbrellawhenyougoout.Heworkedtoohard,sohefellillagain.2021/5/911so....that如此......以致于1.so+形／副＋that

Hewassogladthathecouldn’tsayaword.Thehallissobigthatitcanhold2,000people.Motherlivessofarawaythatwehardlyeverseeher.2021/5/9122.so+形容词＋a(an)＋可数名词单数＋thatHeissogoodaboythateveryteacherlikeshim.Itissoheavyaboxthatthelittleboycan’tcarryit.

2021/5/9133.so＋many/few/much/little＋复名(不可名)+thatSoonthereweresomanypeoplethattheyateallthefood.Hehassolittletimethathecan’tgotothecinemawithyou.可数名词不可数名词2021/5/914such…that“如此的…以致于”表结果。1.such＋a(an)＋形＋可数名词名词单数＋thatMrGreenissuchagoodteacherthateverybodylikeshim.Itwassuchaninterestingfilmthat

everyonelaughed.2021/5/9152.such＋形容词＋复数名词／不可数名词＋thatOurtownhassuchfreshairthateveryvisitorwantstocome.2021/5/9161.so+形／副＋that

2.so+形容词＋a(an)＋单数名词＋that

3.so＋many/few/much/little＋复数名词(不可名)+thatSo强调的是形容词such…that“如此的…以致于”表结果。1.such＋a(an)＋形＋可数名词单数＋that

2.such＋形＋复数名词／不可数名词＋thatSuch强调的是名词2021/5/917她是如此的疲惫，以致于很快就睡着了。

Shewas_____________she______________quickly.2.这是一本非常有趣的小说，以致于我读了三遍。

Itwas___________________novelthatreaditthreetimes.3.他跑得非常快，没人能追上他。

Heruns

_________nobodycancatchupwithhim.4.玛丽有如此多的工作要做，以致于她整天呆在办公室。

Maryhad

______________todothatshestayedatherofficeallday.

so…that/such…thatsotiredthatfellasleepsuchaninterestingsofastthatsomuchwork2021/5/918三：目的状语从句定义：从句表达的是主句行为的目的主要的引导词有:sothat，inorderthat，2021/5/919Theyarehurryingsothattheymaynotmissthetrain.他们匆匆忙忙目的是为了不错过火车

TheyarehurryinginorderthattheymaynotmissthetrainHeworkshardsothathecangetgoodgrades.Heworkshardinorderthathecangetgoodgrades.Sothat引导的目的状语从句中常常含有情态动词can,could,may,might,Would,should2021/5/920区分Inorderthat+句子Sothat+句子Inordertodosthtodosth2021/5/921四：让步状语从句表示尽管...引导词:though，althoughevenif，eventhough

2021/5/922though,although,though,although在句首表“尽管”两者都可以用。不能与but连用。

下列情况只能用though：

▲asthough(=asif);好像

evenif(=eventhough)即使▲在句末表示“然而”

2021/5/9231.____therearetoomanypeoplehere,____wehavetofindanotherhouse.

A.Because;soB.Though;butC.Since;/D./;if

2.ThisTVsetistoodear,____itgivesyouabetterpicture.

A.orB.andC.ifD.though

3.____heisveryyoung,____heknowsseverallanguageA.Though;butB.Because;soC.Though;/D.Because;/

CDC2021/5/9244.Hewas____tired____hecouldn’tgoonworking.A.too;toB.such;thatC.so;thatD.too;that

5.Shewas____wealllikeher.

A.suchagoodsingerB.suchagoodsingerthat

C.a