T he book was writeen in 1978,(since when)the education ststem has witnessed great changes括号里为什么不换成during which ,which不是要引导非限制性定语从句么since when 的含义是什么啊,可以给个详细的解释么
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T he book was writeen in 1978,(since when)the education ststem has witnessed great changes
括号里为什么不换成during which ,which不是要引导非限制性定语从句么since when 的含义是什么啊,可以给个详细的解释么
翻译一下整个句子:这本书写于1978年,从那时开始/从那以后,教育系统经历了很大的变化.
Since when,强调的是时间,从这件事发生以后
如果用during which,就变成了在1978年写书这件事进行中.
since when不是连在一起解释的,since 自从那时。。。。when是接in 1978的
也就是The book was written in 1978, when the education ststem has witnessed great changes。
同意manjusaka85的答案!我就不回答了!嘿嘿!
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