新航道

  新航道上海學(xué)校SAT培訓(xùn)班小編繼續(xù)給大家?guī)鞸AT文法第十四期，每期分享3-5個(gè)文法知識(shí)點(diǎn)，幫助大家更好地備考SAT。

  一、連接詞

  1. 含義：

  主要考察連詞的句內(nèi)關(guān)系和副詞的句間關(guān)系。

  2. 類型：

  (1) 從屬連詞的句內(nèi)關(guān)系

  ① 連詞although、though 引導(dǎo)讓步狀語從句連詞if、unless引導(dǎo)條件狀語從句;

  ② 連詞because、as、since引導(dǎo)原因狀語從句;

  ③ 連詞when、while、before、after、until、since、as soon as等引導(dǎo)時(shí)間狀語從句。

  3. 用法

  (1) 從屬連詞

  由于從屬連詞將從句與主句連接起來，從句不可獨(dú)立，是依附于主句，因此:

  1)從屬連詞引導(dǎo)的從句在主句前時(shí)，從句后要用逗號(hào);

  2)從句在主句后時(shí)，通常無逗號(hào);

  3)從屬連詞前后都無逗號(hào);

  4)兩句僅需要一個(gè)連詞。

  例如 1：Because Tom likes drinking coffee, he normally buys one from the cafe.

  (because引導(dǎo)的從句在主句前，要用逗號(hào)隔開。)

  例如 2：Tom was late for work because he missed the train.

  (because引導(dǎo)的從句“because we missed the bus”在主句后面，此時(shí)不用逗號(hào)。)

  以上兩個(gè)句中because前后都無逗號(hào)。

  例如 3：Because Tom likes drinking coffee, and he normally buys one from the cafe. ?(because連接兩句，無需再加連詞and。)

  所以，連詞前面后面要不要加逗號(hào)，要依據(jù)情況而定。

  真題檢測(cè)

  真題檢測(cè)1

  (16-11AS Q26) While rare works were tucked away in libraries around the world and many are now also a click away on the Internet.

  A. NO CHANGE

  B. world;

  C. world,

  D. world however,

  解析：通過句首的while看出是連詞的考點(diǎn)，根據(jù)“從屬連詞引導(dǎo)的從句在主句前時(shí)，從句后要用逗號(hào)”的原則排除選項(xiàng)C;又根據(jù)“兩句僅需要一個(gè)連詞”的原則排除所以排除選項(xiàng)A和D，所以選B。

  注：16-11AS Q26指2016年11月亞太的第25題，下同。

  真題檢測(cè)2

  (17-08NA Q21) Although Duchenne made his observation about the orbicularis oculi enjoyment smiles as far back as 1862, it has been only in the recent past that empirical evidence has confirmed the existence of there being a high correlation between the contraction of the muscle and self-reported positive moods along with neural activity consistence with positive emotional states.

  A. NO CHANGE

  B. but it has

  C. while it has

  D. it having

  解析：通過句首although等看出是連接詞的考點(diǎn)，根據(jù)“兩句僅需要一個(gè)連詞”，排除B/C選項(xiàng);而D選項(xiàng)有無謂語動(dòng)詞，句子結(jié)構(gòu)不完整，也排除，所以選A。

  真題檢測(cè)3

  (17-10NA Q12) While fare-free policies do increase ridership, but they have not been found to be an effective way to address traffic problems.

  A. NO CHANGE

  B. ridership, and while

  C. ridership,

  D. ridership;

  解析：通過句首while等看出是連接詞的考點(diǎn)，根據(jù)“兩句僅需要一個(gè)連詞”，排除A./B選項(xiàng);又根據(jù)“從屬連詞引導(dǎo)的從句在主句前時(shí)，從句后要用逗號(hào)”排除D，所以選C。

  真題檢測(cè)4

  (17-10NA Q12) Advocates of fare-free policies claim that the costs of these policies are largely offset by various savings, however, a recent study comparing projected results of fare-free policies in different cities found this outlook to be way too sunny.

  A. NO CHANGE

  B. savings,

  C. savings, but

  D. savings; and

  解析：通過選項(xiàng)but等看出是連接詞的考點(diǎn)，however是副詞，不能單獨(dú)分隔兩個(gè)獨(dú)立句，所以排除選項(xiàng)A;而逗號(hào)不能單獨(dú)分隔兩個(gè)獨(dú)立句，所以排除選項(xiàng)B;分號(hào)和and都可以分隔兩個(gè)獨(dú)立句，因此重復(fù)，所以排除D;又根據(jù)“兩句僅需要一個(gè)連詞”，所以選C。

  真題檢測(cè)5

  (17-10NA Q12) Dried collodion is unusable, so once the photo is snapped with a massive, tripod-mounted camera, the photographer has nominal minutes to develop it, using more chemicals.

  A. NO CHANGE

  B. but

  C. and

  D. for

  解析：通過選項(xiàng)so等看出是連接詞的考點(diǎn)，前半句說火棉膠一旦干了就無法用了，后半句說攝影師有幾分鐘去發(fā)展它，所以前后是因果關(guān)系，排除選項(xiàng)B/C/D，所以選A。

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