【正文】 was writing a letter when he came in.● She did not go to bet until she(had)finished her homework.● It is nearly six years since we began to learn English.● Once you begin, you must go on.● By the time I arrived at the station, the train had ，應(yīng)注意下面兩點： 1． 要用一般現(xiàn)在時替代一般將來時，例如： ● I’ll let him know when he ，例如： ●He said he would wait here until I came ：“直到你說明怎么辦之后，我才設(shè)法把這件事做好。例如：She could sing when she was four years 。例如：Be careful when you cross the 。re given,（對）Prisoners have to eat whatever they39。3)ever if, even We39。Child as /though he was, he knew what was the right thing to do.= Though he was a small child, he knew what was the right thing to ： 。Though the sore be healed, yet a scar may ，但傷疤留下了。句意：除非你立即走，否則你就回遲到的。非真實條件句已在虛擬語氣中闡述。t rain tomorrow, we will go there by ，我們就騎自行車去那里。t go to school條件狀語從句用法要點。so foolishsuch a foolso nice a flowersuch a nice flowerso many / few flowerssuch nice flowersso much / little rapid progressso many peoplesuch a lot of people（so many 已成固定搭配，a lot of 雖相當于 many，但 a lot of 為名詞性的，只能用such搭配。結(jié)果狀語從句結(jié)果狀語從句常由so? that 或 such?that引導(dǎo)，掌握這兩個句型，首先要了解so 和 such與其后的詞的搭配規(guī)律。此外還有l(wèi)est, for fear that, in case等詞引導(dǎo)，例如，Please speak more slowly so that we can make full ，以便我們能作詳細筆記。t go, because I was /As the weather is so bad, we have to delay our ）由because引導(dǎo)的從句如果放在句末，且前面有逗 號，則可以用for來代替。d better not go to ，你最好不要去上班了。Why did you go?I went because Tom told me to ？那是因為湯姆叫我去。The waves dashed on the rocks as if in ，好像很憤怒。）It looks as if the weather may pick up very 。漢譯常作“仿佛??似的”，“好像??似的”，例如：They pletely ignore these facts as if(as though)they never ，就仿佛它不存在似的。1）as,(just)as?so?引導(dǎo)的方式狀語從句通常位于主句后，但在(just)as?so?結(jié)構(gòu)中位于句首，這時as從句帶有比喻的含義，意思是“正如?”，“就像”，多用于正式文體，例如：Always do to the others as you would be done ，你就要怎樣待人。We will go wherever the motherland need us 。t start our discussion until / till he ，再開始我們的討論。Not until the early years of the 19th century did man know what heat 世紀初，人類才知道熱能是什么。2)Until when 疑問句中，until要放在句首。I didn39。s get in the wheat before the sun sets.）否定句：She didn39。正確使用這兩個連詞的關(guān)鍵之一就在于判斷句中的動詞該用肯定式還是否定式。比較until和till此兩個連詞意義相同。注：while也可以作并列連詞，表轉(zhuǎn)折的關(guān)系，相當于but，譯為“然而”。ll tell him about it as soon as he es 。(stay表示的動作可以持續(xù))He didn39。（4）.until 意為“直到??時”，引導(dǎo)時間狀語從句時，表示主句的動作發(fā)生在從句的動作之前。We haven39。t throw them （們）用過了塑料袋之后，不準到處亂扔。例如：We cleaned the classroom before we left school ，我們打掃了教室。Just as / Just when / When I stopped my car, a man came up to ）當從句的動作發(fā)生于主句動作之前，只能用when 引導(dǎo)這個從句，不可用as 或 while。注：when也可以作并列連詞，表示一個動詞正在進行的時候，突然間發(fā)生了另外一件事。He was working at the table when I went ，他正在桌旁工作。凡是從句都必須有引導(dǎo)詞，引導(dǎo)時間狀語從句的詞有 when, before, after, until, as soon as, while 等，具體用法如下：（1）.when 意為“當??時”，引導(dǎo)時間狀語從句，表示主句的動作和從句的動作同時或先后發(fā)生。作什么樣的狀語就叫什么類型的狀語從句。）I would do it with pleasure, except that I am too busy.（要不是我太忙了，我會很高興去做的。t speak the way as other people bodies are made up of millions of very small cells, just as a building is made of many stones or speaks French as if(as though)he were a as if 或 as though 引導(dǎo)的從句通常用虛擬語氣，但如果主句謂語是感官動詞，并且所述情況實現(xiàn)可能性大，也可用陳述語氣，如：It looks as if the ing autumn harvest will be even better than the last 主要由 as...as, not so(as)...as, than 等連詞引導(dǎo)，如：This table is as wide as that can not run so(as)fast as conducts electricity better than other of Proportion and Other Types(比例從句和其它從句)比例從句由關(guān)聯(lián)詞 the...the...連接形容詞或副詞比較級構(gòu)成，如：The more she thought about it, the more she liked 如 as...so 和 what...that 引導(dǎo)的類比從句；so(as)far as 引導(dǎo)的范圍從句；except that 引導(dǎo)的例外從句；rather / sooner than 和 would / had rather than 引導(dǎo)的擇比從句等，如：As the desert is like a sea, so is the camel like a ship.（沙漠似海，駱駝似舟。這些連詞與 as, since 意思相近，通常用于書面語，并且它們兼有其它意義。t work hard.)Supposing / Suppose it rains, shall we have the match as scheduled?In case you need anything else, please let me 由 although, though, even though, even if, whether...or, while, as, whwords + ever(= no matter + whwords)等從屬連詞引導(dǎo)，如：He is quite modest though he is the best student in the needle has the same mass whether it is hot or (No matter which)plan you adopt, you will meet with ：(though)不可與連詞 but 連用； 引導(dǎo)的從句意義和 though 相似，但表示的語氣較強，并須將強調(diào)的詞放在句首（但不用 although），如：Simple as(though)the question may seem, it is not at all mon in / no matter how 引導(dǎo)的從句中，however / no matter how 后須緊跟形容詞或副詞，如：However / No matter how hard I tried, I couldn39。7．no matter who/what/where/how等可引導(dǎo)讓步狀語從句，相當于whoever/whatever/wherever/however等。3．注意區(qū)別until和till的不同用法。如果對however的詞性不明確，會導(dǎo)致誤選A項。D She had a tense expression on her face，________she was expecting ．even thoughB．a(chǎn)s though C．so thatD．now that 題意：她表情緊張，好像預(yù)料到麻煩要來。ever since引導(dǎo)時間狀語從句，意思是“自從”；even if引導(dǎo)讓步狀語從句，意思是“即使”。Today，we will begin________we stopped yesterday so that no point will be left ．whenB．where C．howD．what 句意：今天我們從昨天我們停止的地方開始，以便我們不遺漏任何一點。as if 好像；in case以防萬一；while當??時候，而，卻；though盡管。if so 相當于 if something is wrong with the car39。如果這樣的話，我們最好馬上把它開到維修廠(修理一下)。B三、條件狀語從句引導(dǎo)條件狀語從句的連詞有：if，unless(＝if...not)(除非)，so(as)long as(只要)，in case(以防萬一)，on condition that(條件是)，supposing(that)(假設(shè))，provided/providing(that)(假如)等。how 與形容詞和可數(shù)名詞單數(shù)連用的順序為：how＋形容詞＋a(n)＋可數(shù)名詞單數(shù)，與其用法一樣的還有so，too等。Tim is in good shape physically ________he doesn39。引導(dǎo)讓步狀語從句的連詞比較多，常見的有：although，though，while；even if＝even though；no matter＋疑問詞＝疑問詞＋ever；whether…or...。4．before和since 若表達“沒過……就，過了……才”之意時，須用連詞before，句式為“It was/will be＋時間段＋before...”；since意為“自從……”，句式為“It is/has been＋時間段＋since...”。2．a(chǎn)s soon as，immediately，directly，the moment，the minute，no sooner...than，hardly/scarcely...when，once等引導(dǎo)的從句都表示從句的動作一發(fā)生，主句的動作隨即就發(fā)生，常譯為“一??就??”。表示“正在做某事??就在這時(突然)??”用be doing …，所以D項正確。常用于下列句式：(1) doing ...(2) about to/going to do/on the point of doing ...(3) just done ...。It must have rained