【正文】 s和since。當(dāng)原因是顯而易見的或已為人們所知，就用as或 since。I sent the letter by air mail in order that it might reach him in ，以便他能及時(shí)收到。The boy is so young that he can39。連接詞主要有 if, unless, as/so long as, on condition that 等。s raining, they are still working in the ，但他們?nèi)栽诘乩锔苫?。如果?shí)義動(dòng)詞有賓語和狀語，隨實(shí)義動(dòng)詞一起放在主語之前。三：主句與從句時(shí)態(tài)一致的問題。引導(dǎo)這種從句的詞有after, before, as, when, while , till , until, since, once。這種從句由such…that, so…that, so that等引導(dǎo)。例如：● If it rains tomorrow, we’ll stay at home.● He will not e unless he is invited.● Suppose he is absent, what shall we do?● As long as we don’t lose heart , we’ll find a way to overe the 可以引導(dǎo)一個(gè)條件狀語從句，所以正確答案應(yīng)為B。ll go to visit Tiananmen Square ______ it doesn39。的時(shí)候 引導(dǎo)時(shí)間狀語從句 →主將從現(xiàn)什么時(shí)候 引導(dǎo)賓語從句，根據(jù)時(shí)間狀語判斷時(shí)態(tài) ★I don’t know when LiPing will he es ,I’ll call you二．條件狀語從句：if如果unless 如果不。 __________________ 三．詞匯運(yùn)用 doctors are very p_________ with those __________(病人). teacher has had a p__________ puter many _____________(人)are there in your family? needn’t _____________(支付)the mumdid it just boys enjoy chatting with each other by _____________________(打電話). are so many _________(梨)on thetree。這種從句通常用連詞although, though, as, however等；連接代詞whatever, whoever等；起連接作用的短語even if though, no matter how what who 等引導(dǎo)。屬于第一種情況，所以正確答案應(yīng)為A。例如： ● I 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(diǎn)： 1． 要用一般現(xiàn)在時(shí)替代一般將來時(shí)，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：Be careful when you cross the 。3)ever if, even We39。Though the sore be healed, yet a scar may ，但傷疤留下了。非真實(shí)條件句已在虛擬語氣中闡述。t go to school條件狀語從句用法要點(diǎn)。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(gè)句型，首先要了解so 和 such與其后的詞的搭配規(guī)律。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(hào)，則可以用for來代替。Why did you go?I went because Tom told me to ？那是因?yàn)闇方形胰ァ＃㊣t looks as if the weather may pick up very 。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(shí)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。t start our discussion until / till he ，再開始我們的討論。2)Until when 疑問句中，until要放在句首。s get in the wheat before the sun sets.）否定句：She didn39。比較until和till此兩個(gè)連詞意義相同。ll tell him about it as soon as he es 。（4）.until 意為“直到??時(shí)”，引導(dǎo)時(shí)間狀語從句時(shí)，表示主句的動(dòng)作發(fā)生在從句的動(dòng)作之前。t throw them （們）用過了塑料袋之后，不準(zhǔn)到處亂扔。Just as / Just when / When I stopped my car, a man came up to ）當(dāng)從句的動(dòng)作發(fā)生于主句動(dòng)作之前，只能用when 引導(dǎo)這個(gè)從句，不可用as 或 while。He was working at the table when I went ，他正在桌旁工作。作什么樣的狀語就叫什么類型的狀語從句。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(dòng)詞，并且所述情況實(shí)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(jí)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。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(qiáng)，并須將強(qiáng)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，howev