2017托福從屬連詞語法及真題解析
導語：復合句是TOEEL考題的基本句子結構，因而連接主句和從句的連接詞就成為重要的命題焦點。下面YJBYS小編解析從屬連詞語法及真題，歡迎參考!
TOEEL常考的從屬連詞分三類：
(1)關系代詞( that, which ,what who. Whose)
(2) 關系副詞(where when why how)
(3) 狀語從句連接詞 (where, when, if, though, because…)
有關從屬連詞的試題大部分集中在Structure (1-15題中) 掌握命題規律，這類題目并不復雜。
1. 主句與從句之間必須有從屬連詞
全真例題分析
(1)The spiral threads of a spider*s web have a sticky substance on them ------- insects.
(A) traps
(B) trap its
(C) which traps
(D) which it traps
[答案] C 定語從句關系代詞which引導從句，且在從句中作主語。
(2)Angiosperms inhabit relatively diverse environments and may be found ------- higher plants can survive.
(A) there
(B) wherever
(C) somewhere
(D) then
[答案] B 空格前后為兩個完整的句子，這里應填入連接詞聯系主從兩句。四個選擇只有wherever是連詞，引導地點狀語從句。
(3)Duke Wellington was a composer. Conductor, and pianist ------ ranked as one of the greatest of all jazz figures.
(A) him
(B) although
(C) or
(D) who
[答案] D 關系代詞who引導定語從句，并作從句的主語。
(4)-------. Some of the Earth*s interior heat escapes to the surface.
(A) A volcano erupts
(B) A volcano whether erupts
(C) A volcano erupts it
(D) If a volcano erupts
[答案] D 從屬連詞引導條件狀語從句。
2. 關系代詞 who與which混淆錯用
解題要點：在written Expression (16-40題)中的四個選擇答案中出現who 或者which，應確認它所指代的是人還是物。
全直例題分析
(1)Fossil remains indicate that squidlike creatures called belemnites swam in the sea who covered the North American continent 70 million years ago.
[答案] C 關系代詞who指代的是sea，因此應用指物的`which或that。
(2)Vaccines for some rare diseases are given only to persons which risk exposure to the disease.
[答案] B 關系代詞which指代前面的persons，應改為人稱關系代詞who。
(3)Anne Elizabeth McDowell is best remembered for a weekly journal, the Woman*s Advocate, who she launched in January 1855.
[答案] D 關系代詞who指代雜志the woman*s Advocate,故應改為which。
(4) The attorney general of the United States advises the President on any questions of law who may arise in the conduct of administrative affairs.
[答案] B 關系代詞who指代前文的questions of law，故應改為which或that。
3. 介詞+關系代詞which結構
解題要點 介詞+which作用相當于一個關系副詞，在從句作狀語。可表示時間(=when) ,地點(= where) ，原因(=why)等等。
全真例題分析
(1) In reorganizing the curriculum of Mt. Holyoke College in the late 1800*s Elizabeth Mead laid the foundation ------- the modern college rests.
(A) is which
(B) on which
(C) which is on
(D) on it
[答案] B on which 指代on the foundation ，作用相當于一個表示地點的關系副詞。
(2) A circuit may be defined as a closed path ------- electricity can How.
(A) through it
(B) through which
(C) that is through
(D) there goes through
[答案] B through which 指代through the circuit, 作用相當于一個關系副詞，而介詞through才能準確地表達句子的含義。
(3) The extent of the harmful effect of locoweeds on animals depends on the soil ------- the plants grow.
(A) which
(B) which in
(C) in which
(D) in (90.5)
[答案] C in which = where
(4) Adhesives, such as glue, tape and gum, vary with the purpose ------- intended.
(A) they were for
(B) for they were
(C) which were they
(D) for which they were
[答案] D for which指代for the purpose。
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