Jane appears as if she === the secret为什么用knew 而不是 had known ,konw,has been known、

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Jane appears as if she === the secret为什么用knew 而不是 had known ,konw,has been known、
Jane appears as if she === the secret
为什么用knew 而不是 had known ,konw,has been known、

Jane appears as if she === the secret为什么用knew 而不是 had known ,konw,has been known、
这里是虚拟语气.
前面是appears.是一般现在, 后面就是一般过去,语法就是这么规定的.

好像是虚拟语气 = =|||
还像是这么说的
对过去虚拟用had
对现在虚拟用did
对未来虚拟用would should

方式状语从句,虚拟语气,主句用一般现在,从句提前一个时态,用一般过去就可以了