the book was written in 1946,{since when }the education system has saw great changes.请说明一下括号中为什么用since when而不用since which,when为何能指代1946, 这是什么从句since when有无这种特殊用法在定语从句只19

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the book was written in 1946,{since when }the education system has saw great changes.请说明一下括号中为什么用since when而不用since which,when为何能指代1946, 这是什么从句since when有无这种特殊用法在定语从句只19
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the book was written in 1946,{since when }the education system has saw great changes.请说明一下括号中为什么用since when而不用since which,when为何能指代1946, 这是什么从句since when有无这种特殊用法在定语从句只19
the book was written in 1946,{since when }the education system has saw great changes.
请说明一下括号中为什么用since when而不用since which,when为何能指代1946,
这是什么从句
since when有无这种特殊用法在定语从句只1946

the book was written in 1946,{since when }the education system has saw great changes.请说明一下括号中为什么用since when而不用since which,when为何能指代1946, 这是什么从句since when有无这种特殊用法在定语从句只19
其实,这里since when要表明的是一段时间的概念,而since which 只是一个点的时间概念.看看后面的句子,这种改变并不是一蹴而就的.是需要经过一段时间的积累的.所以,when,指代的是1946及以后的一段时间,而并是单单的1946.

时间状语从句。。因为是在那一年education system发生了巨大变化，而不是那本书发生了巨大变化
是这样的，用which，指“the book was written in 1946”这件事了，而句子是为了强调那个时间点

时间状语从句。。因为是在那一年education system发生了巨大变化，而不是那本书发生了巨大变化

因为时间状语从句用when来引导，所以用since when。地点状语从句用where来引导，例如from where。

by who was the book written Who do you think _ A did the book write B was the book written C was the book written byA did the book writeB was the book writtenC was the book written byD the book was written by written by 和written的区别Who was the book written 后面为什么不能加by? A book was written on the subject.He has written a book on this subject.时态? who was the book written by、这个句子对吗 Who was the book---?A.wroteB.writtenC.written The book was written ( )LuXun (介词填空） The book was written by him 变为Who____________________ who was the book weitten by?和whom was the book written by?有什么区别? Whom was the book---?Who was the book---?A.wroteB.writtenC.written by选B对吗? Who was the book( A.write B.wrote C.written D.written by The book ____ (write) by Bill Gates in 2002.是 is written 还是 was written .The book _____ by Luxun is very famous.( write ) 为什么填written而不是was written Many students enjoy the book Harry Potter ( )by JK Rowling.A written B was written C wrote D was writing I borrowed a book()by J.K.Rowling from the library last week.A written B was written The book was written in 1946,( )the education system has witnessed great changes. Here is a note book,in which _______ the names of the visitors.A.write B.written C.were written D.was written the book is written in german 与 the book was written in german 有什么区别吗?翻译成中文又是怎么样的?