you shuld write it on the sand from which the wind can erase it.这是什么知识点?是定语从句怎么还有个介词啊?先行词是什么呀?

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youshuldwriteitonthesandfromwhichthewindcaneraseit.这是什么知识点?是定语从句怎么还有个介词啊?先行词是什么呀?youshuldwriteitonth

you shuld write it on the sand from which the wind can erase it.这是什么知识点?是定语从句怎么还有个介词啊?先行词是什么呀?
you shuld write it on the sand from which the wind can erase it.
这是什么知识点?
是定语从句怎么还有个介词啊?先行词是什么呀?

you shuld write it on the sand from which the wind can erase it.这是什么知识点?是定语从句怎么还有个介词啊?先行词是什么呀?
1、句子意思（直译）：你应该把它写在风可以（从沙子）把它擦走的沙子上.
You should write it on the sand.
The wind can erase it from the sand.
因此这句话的先行词是sand.
2、先行词就是被修饰的词.
比如：他是个来自美国的姑娘.“姑娘”被'来自美国“修饰,就是先行词.
3、介词加先行词的情况很多的.
You may have this pen with which you can write well.
你可以拥有这支让你写字顺手的笔.
Lei Feng is a good man from which we can learn a lot.
雷锋是我们从他身上可以学到很多的一个好人.
4、当介词加先行词构成地点和时间或原因的时候,就可以合并成when where why
He has a room in which/where he can study alone.
The day on which/when we won the macth will never be forgotten.
The reason for which/why he is late is that he was stopped by a policeman.

介词后面的从句一般是宾语从句（介宾）
which

you shuld have put the book where you found it The factory___ Tom works is not far away from his home.A.where B.in where C.for where为什么?那you shuld write it on the sand ____the wind can erase it.是which还是from which？ you shuld write it on the sand from which the wind can erase it.这是什么知识点?是定语从句怎么还有个介词啊?先行词是什么呀? 英语翻译用You shuld/sholdn't You write with it.You write with it.(单词) Write it down before you forget it. 根据首字母提示完成单词1.Don't get s____ out.You shuld take it easy.2.I don't feel l____ eating anything today. Please write carefully,or you have to___(write) it. can you write it on Chinese?改错 May i help you write it?还是May i help you to write it? To remout it read-write:# mount -n -o remount,rw / why don't you write it down 同义句（）you please write it down would you mind ()it down When you feel pain in tooth,you shuld go to see the (d ). write it When did you ______ (write) this song I_When did you ______ (write) this song I________ (write) it last year you shuld try ( )do such a thing again该怎么填?填 to还是not to? 翻译why don't you write it down You'd better write it down,__ ___?(反义疑问句)