狀語從句一．狀語從句定義 狀語從句是一個相當于副詞的從句，在句中起副詞的作用，充當狀語狀語從句主要分為時間，地點，原因，方式，條件，讓步，比較，目的和結果狀語從句溫馨提示：一般情況下，狀語從句從句的引導詞在狀語從句中不充當成分，根據(jù)上下文的邏輯關系來選引導詞，所以要重點掌握狀語從句的引導詞的含義 二.狀語從句的引導詞 狀語從句中的常用連詞和特殊連詞 從句類型常用連接詞特殊連接詞時間狀語從句when，while，as，before，after，since，till，until，as soon as,by the time一些時間名詞：the moment，the instant，the minute，the day，next time，every time，the first time，the last time一些副詞：instantly，immediately，directly固定搭配的連詞：no sooner...than，hardly/scarcely...when地點狀語從句where wherever，anywhere原因狀語從句because，since，as，forconsidering that，given that，in that，now that，for the reason that目的狀語從句(so) that，in order thatlest，for fear that，in case結果狀語從句so/such...that，so thatto the/such a degree that，to the/such an extent that條件狀語從句if，unless，as long assuppose，supposing，providing，provided，on condition that讓步狀語從句although，though，even though，even ifwhile(一般用于句首)，as(用于倒裝結構)，wh－ever＝no matter wh－，whether...or...比較狀語從句as，thanthe more...，the more...方式狀語從句as，as if/thoughthe (same) way，A is to B what C is to D1. 時間狀語從句狀語從句中從屬連詞when，while，as的多種含義 when：當……時候；就在那時；既然；雖然；在……之后；as：一邊……一邊；隨著；雖然；因為；依照，如……；while：在……期間；而；雖然。

用when，while和as填空：①He will take my place ________ I am away.②I was having my lunch ________ the fire alarm went off.③________ you have finished your work，you may have a rest.④________ he swam，he cried for help.⑤________ the Internet is of great help，I don't think it good to spend too much time on it.【答案】①while?、趙hen　③When?、蹵s　⑤While　before的用法 注意判斷before在狀語從句中的含義：才；就；趁……沒有；還沒來得及；寧可……也不；不知不覺解析】before 常用于以下句型： It will (not ) be +時間段+ before….表示“要過多久/ 不久…才…” It was not long + before …表示“不久就….” It was +時間段+ before …表示“過了多久才…”1. 判斷下列各句中before的含義：(　　)①We had sailed four days and four nights before we saw land. (　　)②We hadn't run a mile before he felt tired. (　　)③Please write it down before you forget it.(　　)④Before I could get in a word，he had measured me.(　　)⑤She would die before she'd give in.(　　)⑥Three months went by before we knew it. 2. 區(qū)別以下句型：用before，that，since，when填空：①It's three days ________ he returned home.②It was three days________ he returned home.③It will be three days________ he returns home.④It was three days later ________ he returned home.⑤It was three o'clock ________ he returned.【答案】1. ①才?、诰汀、鄢谩瓫]有 ④還沒來得及?、輰幙伞膊弧、薏恢挥X2. ①since?、赽efore　③before?、躷hat?、輜hen[注]解答此類題目關鍵有三點：首先要確定是不是強調句，當我們把it is/was以及連接詞去掉時，剩余部分若能構成一個完整的句子，就是強調句，這時連詞用that；否則，就要考慮它的句式特點。

其次要看是時間段還是時間點再次是連接詞前后的時態(tài)當確定為時間段時，連接詞前后時態(tài)不一致，用since；時態(tài)一致，用before；當確定為時間點時，強調句就用that，否則就用when The moment he saw me ,he recognized me. 他一看見我，就認出我了（the moment,the minute, the instant 名詞連詞化=as soon as=immediately,directly 副詞連詞化） .till/until 表示到...時間為止主句的動作結束Not...until...表示到...時間為止主句的動作才開始until可用于句首，而till通常不用于句首 Eg. He waited.( until I came here等的動作在我來的時候結束） 他等到我來這兒 He didn’t go there until he finished his homework.(去那里到他完成作業(yè)時才發(fā)生）直到他完成作業(yè)才去那兒 ①She ________ (sleep) until midnight. She ________ (arrive)until midnight.②He didn't go to bed until he finished his work. ＝____．(倒裝句)＝____．(強調句)【答案】①slept；didn't arrive?、贜ot until he finished his work did he go to bed；It was not until he finished his work that he went to bed 2.地點狀語從句:where ,wherever Where there is a will,there is a way.有志者事竟成。

I want to go wherever climate is mild. 我想去氣候溫和的地方 3.原因狀語從句：because, since, as, in that, now that（= since） Because he was ill, he didn’t go to school.（直接原因）因為他病了，他沒去上學 Since/Now that we are all here, let’s begin our meeting.（大家都知道的原因，since既然） 既然大家都到齊了，我們開始開會吧 As he did not know much English , he looked up the word in the dictionary .　　 由于他不懂什么英語，所以查字典 He is a good student in that he studies hard.(in that在于） 溫馨提示:because, since, as, in that, now that（= since）的區(qū)別 because 表示直接原因，用于下面幾種情況 1）用why 提問，回答時必須用because ----Why was he late? ----Because he was caught in the traffic jam. 2)只有because 能用于強調句中 ,不能用since, as, in that, now that It is because he didn’t study hard that he failed in the exam. 3）當前面有副詞時，如partly/mainly/totally等，只能用because The air pollution is very serious mainly because vehicles let out carbon dioxide. 空氣污染很嚴重主要因為車輛排放二氧化碳。

since=now that “既然”，不是直接原因，是大家都知道的原因 as “由于”，在口語中可代替because. for 是并列連詞，放在句末，用逗號和前面的句子隔開，表示解釋說明 It must have rained last night, for the ground is wet now.（兩個并列句） 昨天晚上一定下雨了，因為地濕了 4. 讓步狀語從句: although, though, even if, even though, as, whatever(=mo matter what), however(=no matter how), whoever(=no matter who), whomever(=no matter whom), whenever(= no matter when), wherever(=no matter where), whichever(=no matter which), whether...or... （無論是...還是） Although/though/Even if /Even though it is raining h。