但在某種程式上，狀語從句又是最複雜的，那就是它的那個連線詞。通常如果在狀語從句上有什麼問題，就是連線詞沒有搞清楚。說起原因，就認because,說起條件，只記得if,導致陰溝裡翻船。所以務必全方位出擊連線詞，也就是狀語從句的引導詞，避免冤死在這類弱智從句上。
真正對大腦有點挑戰性的，還在後頭呢。
條件狀語從句
連線詞主要有 if, unless, as/so long as, on condition that 等。.
if 引導的條件句有真實條件句和非真實條件句兩種。非真實條件句已在虛擬語氣中闡述。
unless = if not.
lets go out for a walk unless you are too tired.
if you are not too tied, lets go out for a walk.典型例題you willbelate ___ you leave immediately.a. unlessb. untilc. ifd.or 答案a。句意：除非你立即走，否則你就回遲到的。可轉化為 if you dong leave immediately, youwill belate. b、d句意不對，or錶轉折，句子如為 you leave immediately or you willbelate.
讓步狀語從句
though, although 注意： 當有though, although時，後面的從句不能有but，但是though和yet可連用 although its raining, they are still working inthefield. 雖然在下雨，但他們仍在地里幹活。 he is very old, but he still worksveryhard. 雖然他很老，但仍然努力地工作。 though the sore be healed, yet a scarmayremain. 傷口雖癒合，但傷疤留下了。 （諺語）典型例題1） ___she is young, she knowsquite alot.a. when b. howeverc.althoughd.unless答案：c。意為雖然她很年輕，卻知道許多。2) as, though 引導的倒裝句
as / though引導的讓步從句必須表語或狀語提前（形容詞、副詞、分詞、實義動詞提前）。
child as /though he was, he knew what was the center thingtodo. = though he was a small child, he knew what was the centerthingto do.注意： a. 句首名詞不能帶任何冠詞。
b. 句首是實義動詞，其他助動詞放在主語後。如果實義動詞有賓語和狀語，隨實義動詞一起放在主語之前。
try hard as he will, he never seems able to do theworksatisfactorily.
= though he tries hard, heneverseems… 雖然他盡了努力，但他的工作總做的不盡人意。3) ever if, even though. 即使
well make a trip even though the weather isbad.4)whether…or-不管……都
whether you believe it or not, it is true.5) no matter+疑問詞或疑問詞+後綴ever
no matter what happened, he would not mind.
whatever happened, he would not mind.
替換：no matter what = whatever
no matter who = whoever
no matter when = whenever
no matter where = wherever
no matter which = whichever
no matter how = however
注意：no matter 不能引導主語從句和賓語從句。 （錯）no matter what you say is of nousenow. （對）whatever you say is of no use now.
你現在說什麼也沒用了。(whatever you say是主語從句) （錯）prisoners have to eatnomatter what theyre given, （對）prisoners have to eatwhatevertheyre given. 囚犯們只能給什麼吃什麼。
特殊從屬連詞
所謂特殊從屬連詞，是指一些容易引起誤解的從屬連詞。普通的從屬連詞如because, although,when,因為功能單一，而且頻繁出鏡，一看即知它後面肯定跟著一個狀語從句。另外有些從屬連詞卻不然，乍一看，它不個正經的從屬連詞，因為它還本身更像某種其它詞，如果不能確認它的真實身份，後面出現一個從句可能讓人手忙腳亂，不知所從。其實它們是一群披著各種皮的狼。其中有名詞之“皮”、副詞之“皮”、分詞之“皮”等，需要我們透過現象得其“狼”的本質。辨別詞類1．名詞型從屬連詞。看起來只是一個名詞，但可以引導從句，主要見於時間狀語從句，如the moment。every time ilisten to music ill think of it.he didnttell me anything thelast time i saw him.he flinched each time shespoke to him.themoment/instant i saw him i knew that there was nohope.考題you seethe lightening ____ it happens, but you hear thethunder later.(97-01 cet-4)a. the instant*b. for an instantc. onthe instantd. inan instant2． 副詞型從屬連詞，如directly等。directly he utteredthese words,there was a dead silence.3． 分詞性從屬連詞，如supposing(that)等。supposing(that) it rains, can we play the matchindoors?providing (that)there is no opposition, we shall hold themeeting here.given thattheyre inexperienced, theyve done agoodjob.*少數幾個詞，不再如現在分詞一樣理解，留心即可。辨別從句類別4． that型從屬連詞，如in that,nowthat等now that we have decorated the house, we canmovein.privatization is thought to be beneficial in that itpromotescompetition.*這些一些相對固定的組合，表示特定的邏輯關係，與名詞從句和定語從句區分開來。考題althoughmanypeople view conflict as bad, conflict is sometimes useful ____itforces people to test the relative merits of their attitudesandbehaviors. (2000-01 cet-4)a. by whichb. to whichc. in that*d.sothatlhasa is unique ____ it is the highest city in china.(cet-4)a.on thatb. so thatc. for thatd. in that5．疑問詞及whether...or...staywhere you are!corn flourished best where theground is rich.do ithow you can.wherever you go, whatever you do, iwill be center herewaitingforyou.*也要區別於名詞從句和定語從句。名詞從句功能相當於名詞，故常為主語賓語等，在動詞介詞之後，定語從句在名詞之後。狀語從句作狀語則一般不同。iamgoing whether it is raining or not.ill go, whether you comewith meor stay athome.*與名詞從句分開。除了此處不作主語賓語，作狀語往往與主句有逗號隔開或在句末，而且ornot不能少。一詞多能6．多功能從屬連詞，可引導狀語從句，也可能是為其它功能，意義也有差異。如as, once,since等。as作介詞they enteredthe building disguised as cleaner.as herprivate secretary he hasaccess to all hercorrespondence.作關係詞cyprus, as you know, is anisland in themediterranean.作從屬連詞as he grew older he lost interestin everythingexcept gardening.as shes been ill perhaps shell needsomehelp.much as i like you, i couldnt live with you.once副詞shewasonce a true love of mine.從屬連詞once you have learned spanish,youwill find italian easy.7． 比較句。（有些歸為狀語從句，老邪放在“特別句型”後講）
省略
當從句的主語與主句的主語相同或為it，且從句謂語中含有be動詞時，有時可將從句的主語和be動詞省去。這種省略見於一些時間、地點、條件及讓步狀語從句中。metalsexpandwhen (they are) heated and contract (they are) cooled.when(he was)a student in the university, he read a lot.while (he was)waiting,he took out a magazine to read.a tiger cant be tamedunless (it is)caught very yound.the kind of tree grows favorablywhere (it is)wet.考題a tiger cant be tamed unless ____ very young.(toefl)a. beingcaughtb. caught*c. it being caughtd. its beingcaught____, dr.smith has long been a severe critic of thegovernments economicpolicies.a. although not being an economisthimselfb. although notan economist himself*c. although not havingbeen an economisthimselfd. although being no an economist himselfareagent is anychemical that reacts in a predictable way ____ withother chemicals.(toefl)a. when mixed*b. when is mixedc. it mixedd.when mixinga beamof light will not bend round corners unless _____to do so with thehelp of a reflecting device.a. made*b. to bemadec. being maded.havingas a general rule, snakes dont biteunless ____. (toefl)a.offended*b. are offendedc. theyoffendedd.offending*原則：從屬連詞後要么是完整的主語和謂語動詞，要么主語和be動詞同時省略。狀語從句的倒裝有些條件句有時可不用從屬連詞，而用倒裝語序。虛擬條件句hadilearned the new grammar, i would have done much better.were iyou, iwould not do that.as, though引導讓步狀語從句時old as i am, i canstillfight.try as you may, you will never succeed.fool as helooks, healways seems to make the wisest proposals.exhaustedthough she was,there was no hope of her being able tosleep.配對使用的從屬連詞no sooner hadi arrived home than it began torain.hardly/scarcely had i arrivedhome when it began to rain.nosooner had we begun having dinner thanthe doorbell rang.