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2017年托福语法专项考点解析
导语：不管是写作阅读，还是听力口语，都难免要考察同学们的语法能力。下面YJBYS小编向大家解析2017年的托福语法专项考点，希望对你有用!
1. The Cubists were concerned with how__________a given subject from different points of view simultaneously.
(A) represented
(B) do the represent
(C) to represent
(D) representing
答案：C
考点：不定式。
分析：how後加從句或不定式，而4個答案中無相應從句，故選不定式to represent。
2. Sometimes__________to place physics and chemistry into separate categories.
(A) difficult
(B) is difficult
(C) it is difficult
(D) that it is difficult
答案：C
考点：主謂結構。
分析：本句主、謂語俱缺，應在答案中選擇完整的主謂或主系表結構，即(C)。(A)主語、動词均缺;(B)缺主語;(D)多了that，是從句。
3. Martha Graham, __________, has run her own dance company for half a century.
(A) is the great modern choreographer
(B) one of the great modern choreographers
(C) that the great modern choreographers
(D) the modern choreographers were great
答案：B
考点：同位語。
分析：接在主語後面、兩邊由逗號隔開的成份，可能是主語的同位語，即一說明身份的名词性結構。答案中只有(B)是名词性的。(A)、(D)都有系動词;(C)以that開頭，是從句的一部分。
解題要點：同位語結構是中國學生不甚熟悉而TOEFL考題中常出現的結構。見到主語和謂語動词/系動词之間的，兩邊用逗號隔開的形式，應首先考慮同位語的可能性，選擇名词性結構。
4. Long before children are able to speak or understand a language, __________communicate through facial expressions and by making noises.
(A) however
(B) they
(C) furthermore
(D) who
答案：B
考点：主語。
分析：communicate是謂語動词，前面缺主語。應在答案中選擇名词或代词作主語。(B)代词they可作主語。(A)、(C)既非代词也非名词，不能作主語;(D)用在疑問句或從句中。
5. The seating of musicians in an orchestra is arranged __________to produce the desired blend of sounds from the various musical sections .
(A) the conductor of
(B) from the conductor
(C) the conductor and
(D) by the conductor
答案：D
考点：介词短語/被動語態。
分析：看到被動語態的is arranged，應想到後面可能接by…的結構。在4個答案中選擇以by開頭的介词短語，即(D)。
6. The worldwide race to develop an affordable synthetic fuel has so far consumed billions of dollars and __________ few results.
(A) yielded
(B) yielding
(C) yield ha
(D) has a yield of
答案：A
考点：並列結構。
分析：and前後兩部分，應同形式、同性質。此處and連接兩個謂語部分，前面是consumed…，後面應也是一過去式的動词，即(A)yielded。
7. Experiments in the photography of moving objects __________ in both the United States and Europe well before 1900.
(A) have been conducting
(B) were conducting
(C) had been conducted
(D) being conducted
答案：C
考点：時態。
分析：本句有主語而缺謂語動词，應選擇時態正確的動词作謂語。句中well before l900說明時間是“過去的過去”，時態應用過去完成時，故選(C)。(A)是現在完成時;(B)是過去進行時;(D)不能作謂語動词。
8. The University of Georgia, __________ in 1785, was the first state supported university in the United States.
(A) chartered
(B) was chartered
(C) it was chartered
(D) to be chartered
答案：A
考点：分词短語作後置定語。
分析：此句是TOEFL常考句式。分词短語作定語放在它所修飾的名词後面(A)，相當於被動式的定語從句省掉關係代词which/that及系動词be。(B)若改為which was chartered，(C)用which代替it，(D)去掉to be，亦可。
9. Thanks to modern irrigation, crops now grow abundantly in areas where once __________ cacti and sagebrush could live.
(A) nor
(B) not the
(C) none other
(D) nothing but
答案：D
考点：短語。
分析：Nothing but是固定的短語。(A)nor通常不單獨使用，應與neither連用;(B)not用於否定動词或形容词;(C)是錯誤說法。
10. __________, in the late 1800’s, some libraries had to keep as many as twenty to thirty copies of each of Mary Jane Holmes’s books on hand.
(A) Inventories showing
(B) That show inventories
(C) Inventories show that
(D) Showing the inventories
答案：C
考点：複合句。
分析：本句中some後的部分為從句，前面缺少主句，及連接词。應在答案中選擇完整的主謂結構，即(C)。
11. The scholarly interest in perception stems largely from questions about the sources and validity of what __________.
(A) it is known as human knowledge
(B) is known as human knowledge
(C) known human knowledge
(D) is human knowledge known
答案：B
考点：what引導的名词從句。
分析：介词of應後接名词性成份作介词宾语。What…結構的作用相當於一個名词，它要麼是what+不定式，要麼是what從句，即名词性從句。答案中無不定式形式，只有(B)能與what組成完整的從句，故選 (B)。(A)it與what重複。
12. Because of the Aleuts’ constant exposure to cold weather, they have long recognized __________ .
(A) and body needs to be fat
(B) body needs the fat
(C) how fat the body needs
(D) the body’s need for fat
答案：D
考点：宾语。
分析：recognize是及物動词，其後應接名词性的成份作宾语。(D)是名词片語，故選(D)。(B)看似省掉that的宾语從句，但fat前的定冠词the是錯誤的。(C)如改為how much fat則在句子結構上亦是正確的。
13. Almost all economists agree __________ by trading with one another.
(A) nations that are gained
(B) nations they gain
(C) gaining nations
(D) that nations gain
答案：D
考点：宾语從句。
分析：請注意動词agree的幾種句型結構：(1)agree十宾语從句; (2)agree with/to十名词結構。
14. The development of mechanical timepieces spurred the search for __________ with which to regulate them.
(A) more accurate than sundials
(B) more accurate sundials
(C) sundials more accurately
(D) more accurately than sundials
答案：B
考点：介词宾语。
分析：介词for後面應接名词性的成份作其宾语。4個答案中只有(B)是以名词sundials作中心词的片語，可作介词宾语。
15. Anthropology is a science __________anthropologists use a rigorous set of methods and techniques to document observations that can be checked by others.
(A) in that
(B) that in
(C) that
(D) in
16. Not woman held a presidential cabinet position in the United States until 1933, when Frances Perkins became secretary of labor.
答案：A
測試點：否定詞。
分析：no，not以及none這三個否定詞的用法，常在題中故意混淆。副詞not不能修飾名詞woman，此外應用形容詞no。
解題要點：no或not出現在TOEFL改錯題中，應首先考慮其是否正確。
17. The human body relies on certainty nutrients for its survival.
答案：C
測試點：詞性。
分析：此處修飾名詞nutrients要用形容詞certain，不用名詞certainty.
18. Too much electric current may flow into a circuit as a result either of a fault in the circuit and of an outside event such as lightning.
答案：D
測試點：連詞短語
分析：either…or…的用法。看到either這個詞，要注意尋找其後是否有相應的or。and應為or。
解題要點;either…or，neither…nor, both…and等連詞習語為TOEFL常考題型，注意其前後搭配。
19. The Appalachian Trail, extending approximately 2,020 miles from Maine to Georgia, is the longer continuous marked footpath in the world.
答案：C
測試點：最高級。
分析：形容詞或副詞前有the，後有in the world等表示範圍—類的短語，應當用最高級形式。此處longer應為longest。
解題要點;當TOEFL改錯題中出現劃線的形容詞或副詞的比較級或最高級形式時，應注意其用法是否正確。
20. For years, elephants were hunted for food and ivory, and as a result theirs numbers have been greatly reduced.
答案：B
測試點：詞性。
分析：numbers為名詞，前面要用形容詞性的代詞their。theirs為名詞性質。
21. Barges which carrier most of the heavy freight on rivers and canals are usually propelled by towing.
答案：A
測試點：詞性。
分析：carrier是名詞，而此處需要謂語動詞。應為carries。
解題要點：名詞尾碼-er,-or,-tion,-sion等形式出現在TOEFL改錯題中，應引起特別注意。
22. Although afflicted by serious eyesight problems, Alicia Alonso was one the principal stars of the American Ballet Theater and later formed her own dance company.
答案：C
測試點：習語。
分析：One of the+複數名詞/名詞詞級是固定說法，此處缺of.
23. The ritual combat of animals are triggered by precise signals.
答案：B
測試點：主謂數的一致。
分析：主語是單數的combat,系動詞要用心
解題要點：介詞短語of animals是名詞combat的定語，這類以of引接的定語後置結構要特別注意主謂的數是否一致。
24. It is more difficult to write simply, directly, and effective than to employ flowery but vague expressions that only obscure one’s meaning.
答案：B
測試點：並列結構/詞性。
分析：and的前後部分應同詞性、同性質，此處應用副詞effectively與and前的simply和directly並列，不用形容詞effective。
25. Different species of octopuses may measure anywhere from two inches to over thirty feet in long.
答案：D
測試點：詞性
分析：表示“在長度方面”固定的說法是in length，不用long。從詞性考慮，介詞詛後要加名詞(1ength),不能加形容詞(1ong)。
解題要點;TOEFL考題中表示長(1ong，length),高(high，height),深(deep，depth)等詞的名詞及其形容詞形式常常混淆。
26. According to some theories derived from psychoanalysis, life is supposedly easier and mo re pleasant when inhibitions overcoming.
答案：D
測試點：詞形。
分析：inhibitions前有連接詞when，說明其後應為主謂完整的從句。overcoming不是謂語動詞的形式，應為are overcome。
27. When rainbows appear, they are always in the part of the sky opposite directly the Sun.
答案：D
測試點：詞序。
分析：介詞和它的賓語之間不要加入副詞。此處副詞directly應在介詞opposite之前。
28. Benjamin Franklin drew a political cartoon that is credited raising 10,000 volunteers for the American Revolutionary War.
答案：C
測試點：習語。
分析：Be credited with是固定短語，表示“被認為取得某種成就”。
29. The begins of the modern chemistry laboratory go back to the workrooms of medieval lchemists.
答案：A
測試點：詞性。
分析：此處要求名詞作主語，而begins則是動詞形式。應為beginnings.
30. In many pieces of music there is a dominant theme on which the restful of the composition is centered.
答案：C
測試點：習語/詞性。
分析：The rest of是固定短語。從詞性的角度來分析，冠詞the後面應接名詞。
31. Luminescence refers to the emission of light by means another than heat.
答案：C
測試點：other和another的用法。
分析：遇有劃線的another或other要加以注意，這兩個詞常被相互錯用。此處應為other。Other than是固定說法，表示“除了，不同於”。
32.In a representative democracy, the people election delegates to an assembly.
答案：C 測試點：詞性。
分析：此處需一動詞作謂語，而election是名詞。解題要點;參見本套考題的第(21)題。
33.George Washington Carver found hundred of uses for the peanut, the sweet potato, and the soybean and thus stimulated the cultivation of these crops.
答案：A
測試點：習語。
分析：表示不確定數目的短語，如hundreds of，thousands of，millions of等，均用複數。
34. A citadel, a fortress designed for the defense of a city, usually standed on top of a hill.
答案：D
測試點：不規則動詞的詞形變化。
分析：這類考題數量雖不多，但考的是最基本的知識，不應做錯。stand的過去式是stood，standed是個錯字。解題要點;stand-stood·stood及begin-began-begun等不規則動詞變化形式要記牢。
35. Conservative philosophers argue that the very structure of society is threatening by civil disobedience, while humanists stress the primacy of the individual conscience.
答案：B
測試點：被動語態。
分析：系動詞 (be)和介詞by同時出現是被動語態的信號，它們之間的動詞要用過去分詞。此處threatening應為threatened.
36. Since 1971 the regional corporations set up in Alaska by Congress managing everything from fishing to banking.
答案：C
測試點：詞形。
分析：此處需要謂語動詞形式have managed。句中set up為過去分詞短語，修飾前面的名詞主語corporations。另外注意 (D)banking為名詞，意為“銀行業”。
37. A rocket burns propellant rapidly and most rockets carry a supply that last just a few seconds.
答案：D
測試點：主謂數的一致。
分析：that為從句主語，後接動詞作其謂語。而that代指單數的a supply故其謂語也應用單數形式的lasts。
38. Textile art is known for both its tactile and vision qualities.
答案：C
測試點：詞性/並列結構。
分析：連詞and要求它兩邊是同詞性、同性質的成份。此處and一邊是形容詞tactile，另一邊應當也是形容詞visional，不用名詞vision。
39. The metal aluminum has been first isolated early in the nineteenth century.
答案：B
測試點：時態。
分析：若句中有表示具體時間的狀語，如in the nineteenth century等，則不能用現在完成時，而要用一般過去時。此處has been為was。
40. Gulls can often be see swooping over large bodies of water.
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