once（一旦）引导的是什么状语从句

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• 定语从句中time做先行词,指时间段,时刻,次数时,后面的引导词分别是什么?分别举例说明.“time”这个词做先行词，用介词+which引导，介词的选用，举例说明
• 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
• as long as与as soon as的区别我在仁爱英语时报上见到了这样一个题目弄不明白请大家帮忙看一下:____you have a chance to study in a foreign country, just take it.A.As soon as B.As good as C.As well as D.As long as我觉的D有道理,引导条件状语从句,"只要".可我又觉的A也有道理,引导时间状语从句,"一就"到底是哪一个,他们之间有区别吗?名位朋友，我主要是想知道为什么？As soon as不行！能给个理由吗？
• 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 .
• you must do it as I I told you.as引导的方式状语从句完整吗（还是省略句）?
• 请问下面这个英语句子中的是什么从句,引导词是什么?in which可以用什么关系词来代替?Many people admire the atmosphere in which superiors and subordinates exchanger ideas freely.
• most fruits are naturally sweet and we can eat them just the way they arethe way they are算什么从句,是定语从句,还是方式状语从句?有劳各位大虾了just the way 在主句中是作状语，但they are 是先行词the way 的定语从句吧，the way可以引导状语从句吗？
• once能不能作为状语从句的连接词?
• 1道英语从句题~`the castle,___in 1485 ,was never rebuilt.答案是burnt down,但我想知道burnt down作的是什么成分?那为什么不能写having burnt down啊?是不是就因为有了in 1485 这个时间状语了 所以不能再用状语having been burnt down吧？
• once后面时态.１、Once he said that,I know he was lying.2.Once you have make a promise,you must carry it out.两句都对?once后面究竟完成时态还是一般时?
• since在原因状语从句中 延续性动词与非延续性动词都可接?