作业帮this school is （what it was） before
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this school is （what it was） before
这句话怎么理解啊,请从语法角度剖析.
这句话怎么理解啊,请从语法角度剖析.
主语this school,系动词is,表语what it was before（it代指前面school）,before是时间词,可做时间状语理解
what it was before是由特殊疑问词what引导的名词性从句（在本句里属于表语从句）,意为“它之前的样子”也即学校之前的样子
再问： 这里一定要用what 吗？that不行吗？
再答： what既是前面is的表语也是后面was的逻辑表语。遇到这样的题目，可以直接选what
what it was before是由特殊疑问词what引导的名词性从句（在本句里属于表语从句）,意为“它之前的样子”也即学校之前的样子
再问： 这里一定要用what 吗？that不行吗？
再答： what既是前面is的表语也是后面was的逻辑表语。遇到这样的题目，可以直接选what
this school is （what it was） before
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