before引导的状语从句例子

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• 先行词是the way,place,time,reason关系副、代词何时可省?为什么这句要加where:We've all used thermometers to measure temperature but sometimes we need to measure temperature in places WHERE you can't put a thermometer.语法说,先行词是the way,表示方式,可用that（可省）或in which来引导一个定语从句.如果先行词是时 间或原因,也可用that（可省）或when或why来引导定语从句.如：（1）This was the reason that/why he was late yesterday.（2）This is the last time that I shall give you a lesson.这句是道改错题,还要加上where 是什么原因?没表达清楚，我的意思是that代替关系副词，那么我这道改错题为何还要加
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• He tried to remember in what year he had first heard mention of Big Brother.句中what引导的是什么从句?what在从句中做什么成分?
• You must try to hold the tool as I do.这里的as引导的方式状语从句完整吗?（如果不完整是不是省略现象类似的还有you should do as I told you .
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