【正文】 n stops. We won?t start until Bob es. Don?t get off until the bus stops. 難點(diǎn)鏈接 2. 條件狀語從句 1)引導(dǎo)條件狀語從句的連詞有 if（ 如果）、 unless（ 除非）等，條件狀語從句也像時(shí)間狀語從句一樣，如果主句用將來時(shí)，從句要用現(xiàn)在時(shí)代替將來時(shí)。 You will fail unless you study hard．＝ You will fail if you don39。其中， and表示句意順承； or表示轉(zhuǎn)折，意為“否則”。 例如： Tom runs faster than John does. This classroom is as big as that one. 1）表示甲與乙在某一方面相同時(shí)，用“ as＋ 原級＋ as”句型；表示甲在某一方面不如乙時(shí)，用“ not as ／ so ＋ 原級＋ as”句型。t run as／ so fast as Kang Li． 2）表示甲超過或不及乙時(shí)，用“比較級＋從句”（從句中常省略意義與主句相同的部分）。 常用句型有： so＋ 形容詞／副詞＋ that從句 such a／ an ＋ 形容詞＋單數(shù)可數(shù)名詞＋ that從句 such＋ 形容詞＋復(fù)數(shù)可數(shù)名詞／不可數(shù)名詞＋ that從句 so＋ 形容詞＋ a／ an＋ 單數(shù)可數(shù)名詞＋ that從句 例如： He spoke so fast that I couldn39。 例如： Soon there were so many deer that they ate up all the wild roses. He has so little time that he can?t go to the cinema with you. 難點(diǎn)鏈接 (3)so… that和 such...that 在由 so...that引導(dǎo)的結(jié)果狀語從句中， so是副詞，與形容詞連用。 例如： He was so glad that he couldn?t say a word. The hall is so big that it can hold 2,000 people. Mother lives so far away that we hardly ever see her. 在由 such… that引導(dǎo)的結(jié)果狀語從句中， such是形容詞，它修飾的可以是單數(shù)或復(fù)數(shù)可數(shù)名詞，也可以是不可數(shù)名詞；名詞前面可以帶形容詞，也可不帶。 例如： It was such a hot day that nobody wanted to do anything. He had such long arms that he could almost touch the ceiling. He made such rapid progress that he did very well in the midterm. 有時(shí)上述兩種結(jié)構(gòu)是可以互換的。 because常回答 why引導(dǎo)的疑問句，該從句一般位于主句后； since比 as正式，兩者不回答 why引導(dǎo)的問句，而且其從句一般放在句首。 because引導(dǎo)的原因狀語從句多放在主句之后。 as和 since語氣較弱，一般用來表示明顯的原因。 例如： Why aren?t going there?Because I don?t want to. As he has no car, he can?t get there easily. Since we have no money, we can?t buy it. (3)because和 so不能同用在一個(gè)句子里。 The oil must be out, for the light went out. （ 5） because和 becouse of 也有明顯的區(qū)別 。 He is late for school because it rains heavily. He is late for school because of the heavy rain. 難點(diǎn)鏈接 6. 目的狀語從句 (1)目的狀語從句通常由 so that, in order that引導(dǎo)。區(qū)別這兩種從句的辦法有兩個(gè)： 1)目的狀語從句里往往帶有情態(tài)動(dòng)詞 can, could, may, might等。 例如： Speak clearly so that they may understand you. （ 目的狀語從句） Jack is badly ill so that he has to rest. (結(jié)果狀語從句 ) 難點(diǎn)鏈接 (3） 結(jié)果和目的狀語從句還要注意以幾點(diǎn)： ① so … that so ＋ 形容詞 ＋ a ＋ 名詞 ＋ that， 如： She is so beautiful a girl that everyone likes her 或用 such ＋ a ＋ 形容詞 ＋ 名詞 ＋ that, 如： She is such a beautiful girl that everyone likes her ② 在不可數(shù)名詞或可數(shù)名詞復(fù)數(shù)前只能用 such， 如： It is such good weather we want to go for a piic 又如： They are such good players that they should win the game. ③ 在 much， many， few， little 之前只能用 so， 如： I have so little money that I can39。 例如： Though he is young, he knows a lot. Although I am tired, I must go on working. Even if he is poor, she loves her husband. (2)because不能與并列連詞 so， though ／ although不能與 but同時(shí)在句中使用。 如： I will do it as you tell me．我將照你說的做。 as 作為連詞其后接從句， 如： Please do it as I did it 但后面的句子常作省略， 如： Please do it as I 而 like 是介詞，其后要接的是賓語， 如： Please do it like me 9. 地點(diǎn)狀語從句 地點(diǎn)狀語從句常常由 where來引導(dǎo)。 2.［誤］ While I was walking along the street yesterday, I met an old friend. ［正］ When I was walking along the street yesterday, I met an old friend. ［析］ 這里用 when表達(dá)在一個(gè)動(dòng)作的進(jìn)行中，另一個(gè)動(dòng)作突然發(fā)生了。 3.［誤］ While I heard the bad news I felt sad. ［正］ When I heard the bad news, I felt sad. ［析］ while不能表達(dá)一點(diǎn)兒的時(shí)間，即瞬時(shí)某一時(shí)間點(diǎn)。更要注意的是 because, as, since與 for 4個(gè)表示原因的連詞中 because是因果關(guān)系，是最強(qiáng)的一個(gè)，而 for是最弱的一個(gè)。這里用 when雖然不能講是語法上的錯(cuò)誤，但則看不出來小女孩因獨(dú)自走黑暗的街道因害怕而唱歌的心情。clock last night. ［正］ I didn39。clock last night. ［正］ I did my homework until twelve o39。因截止性動(dòng)作的否定式應(yīng)看作是持續(xù)性的動(dòng)作。 7.［誤］ I have studied English when I was twelve. ［正］ I have studied English since I was twelve. ［析］ since引出的時(shí)間狀語從句是表達(dá)了一個(gè)時(shí)間點(diǎn)，而這個(gè)時(shí)間點(diǎn)是主句動(dòng)作的啟始點(diǎn)，所以主句一般要用完成時(shí)態(tài)。t study hard, so he didn39。t pass the exam because he didn39。ll ask you some questions. ［正］ Before I give you the answer, I39。在中文中可以講 我沒給你答案前 。 正誤辨析 10.［誤］ He was such excited that he could not sp