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引导语是什么意思
引导语是什么意思：用于引出下面内容，并一定程度上概括下面内容的语言。代表金的字
引导词是英语语法中的.专有名词。引导词就是引导从句的词，比如whether，how，what ，why，if，when等具有引导其后从句功能的词。
引导语互换规则
先行词是物时，其引导词可用which也可用that，通常情况下二者可互换，但在有些情况下不能。
1.用which不用that引导定语从句的三种情况：
①在引导非限定性定语从句时，和在介词后不能用that，应用which。如：
Football，which is a very interesting game，is played all over the world.
人在江湖飘啊②先行词为that时，为了避免重复，定语从句用which不用that引导。
如：That which you borrowed from me wasn t a real diamond necklace.
囊萤映雪的意思③介词后用which不用that引导。如：
The method with which you solved the problem is very good.
2.用that不用which的七种情况：
whether是什么意思
①先行词前有形容词最高级或序数词修饰时，用that不用which引导。如：
This is the best place that I have ever visited.生长发育迟缓
The second question that is asked is why we don t fall off the earth.
②先行词为little，much，all，none，few，(the)one，something，everything，nothing，anything 等不定代词时，用that引导。如：
There is nothing in the world that can frighten him.
③先行词既有指人的名词又有指物的名词时，用that引导。如：
He told us about the people and the cities that he had visited.
④先行词前有any，all，no，few，every，some，little，much，(the)very，(the)only，(the)last 等词修饰时，用that引导。如：
This is the very coat that I need.
Is oxygen the only gas that helps fire burn?
⑤先行词为which时，为了避免重复，用that引导。如：
Which is the book that you bought yesterday?
⑥先行词在从句中作表语时，常用that引导。如：
Shanghai is no longer the city that it used to be in the 1930 s.
⑦当主句是句型时，用that引导。
There are two tickets for the film that are for you two.
引导语：直接引用就是，第三者转述他人的话时说的是他的原话，反映在书面上就是用引号引起来，就是这个样子的。