She tried every way that she could find to solve the problem.为什么不能用which

He tries every way ___she could find to solve the problem．~

呵呵，应该选C，给你简单说说：

大意：他试了所有能找到的方法来解决这个问题。

这里she could find 做定语从句(排除A，B），修饰way,所以，这里可以添that,也可以省略不填，不可以用which.



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定语从句中，先行词前面有形容词最高级，序数词next, last, very, any, little, no，every等修饰时，用that 不用which引导定语从句，that可以省略。

way是先行词，被every所修饰时，关系词只用that 不用which。

限制性定语从句中只能用that 引导定语从句的几种情况：
1. 当先行词是everything, anything, nothing （something 除外）, all, none, few, little, some等不定代词时，或当先行词受every, any, all, some, no, little, few, much等词修饰时。如：
Have you set down everything that Mr Li said?
There seems to be nothing that is impossible to him in the world.
注意： 当先行词指人时，偶尔也可用关系代词who。如：
Any man that / who has a sense of duty won’t do such a thing.
All the guests that / who were invited to her wedding were important people.
2. 当先行词被序数词修饰时。如：
The first American movie that I watched was the Titanic.
3. 当先行词被形容词最高级修饰时。如：
This is the best museum that I have visited all my life.
4. 当先行词被the very, the only, the first / last等修饰时。如：
She is the only person that understands me.
After the big fire, the old car is the only thing that he owns.
注意： 当先行词指人时，偶尔也可以用关系代词who。如：
Wang Hua is the only person in our school who will attend the meeting.
5. 当先行词前面有who, which等疑问代词时。如：
Who is the man that is standing in front of the crowd?
Which is the room that Mr Wang lives in?
6. 当先行词为人与动物或人与物时。如：
Look at the man and his donkey that are walking up the street.
7. 当先行词是reason, way（方法）等词时，关系代词常用that代替in which, for which, why, 也常可省略。如：
She admired the way （that） they solved the questions.

that she could find 是定语从句，修饰先行词every way ，一般只用that而不用which来修饰先行词every way。她尝试了她能找到的每种方法来解决这个问题。

答案是：she
did
try
her
best
to
solve
the
problem
意思是：她确实尽力去解决这个问题了

☞
♧手工翻译☀尊重劳动☀欢迎提问☀感谢采纳♧
☜

先行词被every 修饰了...

被不定代词之类的词修饰，比如all, much, any, every ,each 常用that

关系分句按先行项（先行词）的语义关系分为限制性和非限制性关系分句。
限制性分句和它的先行词所指意义有着不可分割的联系，缺少了它，先行词便不能明确表示其所指对象。先行词指物的话，一般用that引导。它通常出现的搭配有：1.当先行词带有不定冠词a，或定冠词the；2.先行词带有all, any,some, every, no 等不定限定词，如题目中的every way that she could find 因为先行词every way 带有every(不定限定词），所以后面的分句she could find通常是限制性的，要有that.
非限制性分句和它的先行词之间只有比较松散的联系，只是对先行词提供一些补充说明，若省略也不影响先行词所指意思（在书写中常用逗号隔开）。它的引导词有 who, whom, whose 和which等wh-词

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