【文章內(nèi)容簡介】 hine is no use. =Unless it is repaired, the washing machine is no use.（2）連詞 +　現(xiàn)在分詞Look out for cars when crossing the street(= when you are crossing …).過街時當(dāng)心車輛。（3）連詞 + 形容詞/其他常見的有it necessary、if possible、when necessary、if any等。She hurriedly left the room as though /if angry (= as though/if she was /were angry…).她急匆匆地走出屋去，好象很生氣的樣子。If possible, I’d like to have two copies if it (= if it is possible,…). 可能的話，我想要兩本。She advised me not to say anything unless asked (= unless I was asked).她勸我別說什么，除非有人要我說。As a young man, he studied law and became a lawyer(= As/ When he was a young man,…).他年輕時就學(xué)了法律，并當(dāng)了律師?！褂脿钫Z從句時要注意的幾個問題在時間和條件（有時也在方式、讓步等）從句中，主句是一般將來時，從句通常用一般現(xiàn)在時表示將來。. We’ll go outing if it doesn’t rain tomorrow.I’ll write to you as soon as I get to Shanghai.有些時間、地點、條件、方式或讓步從句，如果從句的主語與主句主語一致（或雖不一致，是it），從句的謂語又包含動詞be ，就可省略從句中的“主語 + be”部分。. When (he was) still a boy of ten, he had to work day and night.If (you are) asked you may e in.If (it is) necessary I’ll explain to you again.注意區(qū)分不同從句：引導(dǎo)的是什么從句，不僅要根據(jù)連詞，還要根據(jù)句子結(jié)構(gòu)和句意來判別。以where為例，能引導(dǎo)多種從句。. You are to find it where you left it.（地點狀語從句）Tell me the address where he lives.（定語從句，句中有先行詞）I don’t know where he came from.（賓語從句）Where he has gone is not known yet.（主語從句）This place is where they once hid.（表語從句）▲引導(dǎo)時間狀語從句的“一……就”英語中有許多詞和短語可用以引導(dǎo)時間狀語從句，表示“一……就……”，它們雖不是連詞，但具有連詞的功能。這些詞歸納起來，主要有以下幾類：一、名詞類這類詞主要有the moment, the minute, the second, the instant, the day 等。如：The moment I saw him I knew there was no hope. 我一看到他就知道沒希望了。The instant he opened the door he saw the thief. 他一開門就看見了這個賊。He is going to visit his aunt the day he arrives in Beijing. 他一到北京，就去看他姨媽。二、副詞類這類詞主要有immediately, directly, instantly, once 等。如：Once he arrives, we can start. 他一來我們就可以開始。Immediately he came I told him the news. 他一來我就把消息告訴了他。三、句型類這類詞主要有no sooner…than, hardly…when等。如：We had no sooner set out than it began to rain. 我們剛出發(fā)就下雨了。She had hardly arrived when it began to snow. 她剛到就下起雪來了。注：若將 no sooner, hardly 置于句首，則其后要用倒裝語序。如：We had no sooner reached the airport than the plane took off.=No sooner had we reached the airport than the plane took off. 我們剛到機(jī)場，飛機(jī)就起飛了。[高考鏈接]1.(2007北京)Leave your key with a neighbour________you lock yourself out one day. since if after case答案：D句意：留一把鑰匙給你的鄰居以防哪天你忘了帶鑰匙進(jìn)不了門。A、B、C三項均不符合題意，只有D項表示“以防，以免”符合邏輯，故選擇D.2.(2007天津) It is difficult for us to learn a lesson in life_______we’ve actually had that lesson . 答案：A句意：在親身經(jīng)歷之前，我們很難去體會生活中的教訓(xùn)。根據(jù)題意，B、C、D項均不符合邏輯，只有A項最佳。只是對于until的考查已不再像過去那樣考查not…until句型，由此題看出，對該詞的考查已趨于復(fù)雜。 3.(2007上海)Pop music is such an important part of society________it has even influced our language . 答案：B句意：流行音樂是社會中如此重要的一部分以至于它影響了我們的語言。本題考查“such…that”句型，that引導(dǎo)結(jié)果狀語從句。本題考生很可能誤選A，構(gòu)成“such…as”結(jié)構(gòu)，但該結(jié)構(gòu)中的as引導(dǎo)的是定語從句，而定語從句需是一個殘缺的句子，it has even influence our language并不殘缺，故選A項錯誤。4.(2006北京) He found it increasingly difficult to read,_________his eyesight was beginning to fail. 答案：B for 在此處為并列連詞，解釋前一句的情況。5.(2006湖南) I had just stepped out of the bathroom and was busy drying myself with a towel______ I heard the steps. 答案：B 句意：我剛走出浴室，正忙著用毛巾擦身體，就在這是我聽到了腳步聲。When用作并列連詞，意思為“正在此(那)時”。6.(2006江西) In peace, too,the Red Cross is expected to send help______there is human suffering. 答案：D 題中所填關(guān)聯(lián)詞后的句子“ there is human suffering”結(jié)構(gòu)中不缺主語和賓語，因此排除要在從句中充當(dāng)主、賓語成分的A、C選項。而B選項是作方式狀語。故表地點的wherever最佳。7.(2006江蘇)________environmental damage is done, it takes many years for the ecosystem(生態(tài)系統(tǒng))to recover. if only 答案： D. 題中A項表示“即使，雖然，縱然”；B項if only但愿，要是。就好了；C項，雖然，當(dāng)。時候，均不符合題意。只有D“一旦”表條件，符合題意。8.(2008上海春)_________this is only a small town, it’s crowded with tourists who e here all year around. 答案：D句意：雖然這只是一個小鎮(zhèn)，但是整年都有很多游客來此觀光。根據(jù)句意A、B、C三項都不符合邏輯。D“雖然”才是最佳答案。9.(2008遼寧)_________hungry I am, I never seem to be able to finish off this loaf of bread . 答案：D 考查讓步狀語從句。句意：無論我多么餓，我好像永遠(yuǎn)不能吃完這塊面包。此處however引導(dǎo)讓步狀語從句，相當(dāng)于no matter how.10.(2007安徽) The field research will take Joan and Paul about five months。 it will be a long time ________we meet them again . 答案：B 句意：這個項目的研究要花掉Joan和Paul五個月的時間。要好長時間我們才能見到他們。 A、C、D三項都不符合句意；只有before與一段時間連用，意為“。才，就”，故選B。[基礎(chǔ)訓(xùn)練題]1. Not until all the fish died in the river __________how serious the pollution was.A. did the villagers realize B. the villagers realizedC. the villagers did realize D. didn’t the villagers realize2. —Why do you drink so much coffee?—Well, _________it doesn’t keep me awake in the nights。 I see no harm in it.A. although B. if C. unless D. while3. It was __________it rained heavily that they didn’t e.A. as B. because C. for D. since4. Why not buy a cheaper one, _____________you don’t have enough money?A. since B. because C. for D. though5. It is ten years ____________I left home.