在复合句中,引导定语从句的关系词主要有关系代词和关系副词。定语从句中的连接词(关系代词和关系副词)一般都放在先行词和定语从句之间起连接作用,而且是作定语从句的重要成分。以下是小编整理的定语从句中的从属连词，供大家参考借鉴，希望可以帮助到有需要的朋友。

复合句是考题的基本句子结构，因而连接主句和从句的连接词就成为重要的命题焦点。toeel常考的从属连词分三类：

(1)关系代词( that, which ,what who. whose)

(2) 关系副词(where when why how)

(3) 状语从句连接词 (where, when, if, though, because…) 掌握有关从属连词的试题命题规律，这类题目并不复杂。从属连词常考题型及解题要点：

例题分析

(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 定语从句关系代词which引导从句，且在从句中作主语。

(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 空格前后为两个完整的句子，这里应填入连接词联系主从两句。四个选择只有wherever是连词，引导地点状语从句。

(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 关系代词who引导定语从句，并作从句的主语。

(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 从属连词引导条件状语从句。

解题要点：在四个选择答案中出现who 或者which，应确认它所指代的是人还是物。　例题分析

(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] 关系代词who指代的是sea，因此应用指物的which或that。

(2)vaccines for some rare diseases are given only to persons which risk exposure to the disease.[答案] 关系代词which指代前面的persons，应改为人称关系代词who。

(3) essentially, a theory is an abstract. symbolic representation of ______ reality.

(a) what it is conceived (b) that is conceived

(c) what is conceived to be (d) that is being conceived of　 [答案] c what = the thing that (is conceived to be…) .答案(a)中的代词it是多余的，因为what本身即已包含了先行词(the thing ) 和关系代词(that) 。答案(b)中的关系代词that引导的从句不可以置于介词的后面。

(5) most of the food what elephants eat is brought to their mouths by their trunks.

[答案] what应改为that。此句已含有先行词food，不能再用关系代词what。5. 主句和从句

解题要点 主语从句是常考而中国考生又较陌生英文文法结构。主语从句的特点是读起来有种头重脚轻的感觉，而且有两个谓语动词。连词that 引导的主语从句应特别留意。因为that 在句中没有任何意义，它只具有引导出主语从句的功能，因而很容易被忽略。　例题分析

(1) _____ xenon could not from chemical compounds was once believed by scientists.

(a) for (b) it was (c) that (d) while

[答案] c that引导的.主语从句。其中第一个谓语动词could from 是从句的谓语，第二个系动was是主句的谓语。

(2) ______ to space travelers is high acceleration of deceleration forces.

(a) danger can be (b) they can be dangerous

(c) what can be dangerous (d) while danger

[答案] c what引导的主语从句。what既是从句的连词，又是从句的主语。

(3) ______ has been a topic of continual geological research.

(a) did the continents originate (b) how did the continents originate

(c) have the continents originated

(d) how the continents originated

[答案] d how 引导的主语从句。

(4) ______ progress helps to relieve scarcities is a fact accepted by economists.

(a) technological (b) that technological

(c)although technological (d)there is technological

[答案] b. that 引导的主语从句，当连续读到两个谓语动词(e.g. helps…is)，而空格在句首，应首先考虑主语从句。这是主语从句典型的句子结构。

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