【正文】 before, after, when, while, as, since, till, until, as soon as等。“當(dāng)…時(shí)候”的while, when, as的用法區(qū)別是：while從句中的謂語(yǔ)動(dòng)詞必須是延續(xù)性動(dòng)詞；表示帶有規(guī)律性的“每當(dāng)”或當(dāng)主、從句謂語(yǔ)動(dòng)詞的動(dòng)作發(fā)生有先后時(shí)，只能用when；當(dāng)表示“一邊…一邊…”或“隨著”時(shí)，只能用as。另外，用于此義的as所引導(dǎo)的時(shí)間狀語(yǔ)從句謂語(yǔ)只能是動(dòng)作動(dòng)詞，不能是狀態(tài)動(dòng)詞。如下面一道高考題的答案是B 而不能是A：“I’m going to the post office.” “______ you’re there, can you get me some stamps?” 3，表示相應(yīng)動(dòng)作結(jié)束的時(shí)間；在否定句中通常連用非延續(xù)性動(dòng)詞，表示相應(yīng)動(dòng)作開(kāi)始的時(shí)間，意為“直到…才”。如：He waited until she was about to 。I did not begin to work till he had ?！耙弧汀背胊s soon as外，還可用the minute, the second, the instant, immediately, directly, instantly, no sooner…than, hardly…when等。如：I came immediately you 。Hardly had she arrived when it began to 。The moment I have finished I39。ll give you a 。 time, each time,(the)next time,(the)last time, by the time, the first time, any time等以time結(jié)尾的詞語(yǔ)也可用作連詞，引導(dǎo)時(shí)間狀語(yǔ)從句。如：Next time you e in, please close the ，請(qǐng)關(guān)門(mén)。He didn’t tell me anything the last time I saw 。By the time I got home, she had already gone to 。二、條件狀語(yǔ)從句, unless, as [so] long as等。如：Don’t e unless I ，否則你別來(lái)。If you watch carefully you will see how to do 。As long as you do your best, we’ll be ，我們就滿意了。 case也可引導(dǎo)條件狀語(yǔ)從句，其意為“如果”、“萬(wàn)一”。如：In case I forget, please remind me about ，請(qǐng)?zhí)嵝盐?。三、讓步狀語(yǔ)從句, though, however(=no matter how), even if(即使), whether…or(不論…還是)等連詞。如：The speech is good, though it could be ，雖然還可以再好一點(diǎn)。He went out even though it was ，他還是出去了。，但要將名詞、形容詞或副詞等提到as前，若提前的是單數(shù)可數(shù)名詞，要省略a / an。如：Teacher as he is, he can’t know ，他也不可能什么都懂?！氨M管”、“雖然”，引導(dǎo)讓步狀語(yǔ)從句。如：While we don’t agree we continue to be ，我們還是朋友。, whoever, however, whenever, wherever等引導(dǎo)讓步狀語(yǔ)從句。如：Don’t lose heart whatever you ，都不要灰心。Whoever you are, you can’t pass this ，你都不能從這里通過(guò)。注：表示“雖然”的though, although不可與but連用，但可與yet, still連用。四、原因狀語(yǔ)從句, as, since, seeing(that), now(that)等：They can’t have gone out because the light’s ，因?yàn)闊暨€亮著。Since you are going, I will ，我也去。Now that we are alone, we can speak ，可以隨便談了。，when有時(shí)也可引導(dǎo)原因狀語(yǔ)從句，其意“既然”。如：I can’t tell you when you won39。t ，我就不告訴你了。：(1)as與 since, now that一樣表示雙方都知道的原因，通常位于主句前，且均不可用于強(qiáng)調(diào)結(jié)構(gòu)被強(qiáng)調(diào)。(2)當(dāng)表示直接的因果關(guān)系，回答why時(shí)，或有only, just, all, partly, not, but等副詞修飾時(shí)，或用在強(qiáng)調(diào)結(jié)構(gòu)中都只能用because。(3)for有時(shí)也可引出表示原因的分句，但它只能位于后面，對(duì)前一分句加以解釋或推斷。(4)不要受漢語(yǔ)意思影響將表示“因?yàn)椤钡倪B詞與表示“所以”的so連用。五、地點(diǎn)狀語(yǔ)從句引導(dǎo)地點(diǎn)狀語(yǔ)從句的從屬連詞主要有where(在…的地方), wherever(無(wú)論什么地方), everywhere(每個(gè)…地方), anywhere(任何…地方)。如：I’m not living where I 。You can’t camp where [wherever, anywhere] you like these 。Everywhere I go, I find the same ，我都發(fā)現(xiàn)同樣情況。，誤認(rèn)為考試不會(huì)涉及，但恰恰相反，地點(diǎn)狀語(yǔ)從句卻是英語(yǔ)考試經(jīng)常考查的一個(gè)知識(shí)點(diǎn)。請(qǐng)看以下考題：(1)When you read the book, you’d better make a mark ______ you have any which where place where (2)After the war, a new school building was put up ______ there had once been a (3)You should make it a rule to leave things ______ you can find them (4)She found her calculator ______ she lost which 以上四題均選where，其意為“在…的地方”，用以引導(dǎo)地點(diǎn)狀語(yǔ)從句。六、目的狀語(yǔ)從句 order that, so that, in case, for fear等。如：I hired a boat so that I could go 。Take your coat in case it rains(should rain).帶著雨衣以防下雨。He studied hard in order that he could pass the ，是為了能通過(guò)考試。 that有時(shí)可省so或 that，即單獨(dú)用so或 that來(lái)引導(dǎo)目的狀語(yǔ)從句。如：Check carefully, so any mistake will be ，以便任何錯(cuò)誤都可檢查出。Bring it closer that I might see it ，使我能看得清楚些。七、結(jié)果狀語(yǔ)從句引導(dǎo)結(jié)果狀語(yǔ)從句的從屬連詞主要有so that, so…that, such…that等。如：He was so angry that he couldn39。t 。He shut the window with such force that the glass ，結(jié)果玻璃震破了。注：so…that和such…that中的that有時(shí)(尤其在口語(yǔ)中)可省略。八、比較狀語(yǔ)從句常用引導(dǎo)詞：as(同級(jí)比較), than(不同程度的比較)特殊引導(dǎo)詞：the more … the more …。just as …，so…。A is to B what /as X is to Y。no … more than。not A so much as BShe is as badtempered as her house is three times as big as more you exercise, the healthier you will is to men what oil is to ，猶如油之于機(jī)器。九、方式狀語(yǔ)從句常用引導(dǎo)詞：as, as if, how特殊引導(dǎo)詞：the wayWhen in Rome, do as the Roman behaved as if she were the we teach our children the way our parents havetaught us.[設(shè)計(jì)說(shuō)明]這個(gè)步驟主要是