He stared at me as if () me for first time A to see B saw C having seen D seeing 为什么选D?

题目

He stared at me as if () me for first time A to see B saw C having seen D seeing 为什么选D?
书上说在这里as if / as though也可以引导一个分词短语、不定式短语或无动词短语
但是as if / as though不是也能用于虚拟语气吗?这两个在用的时候有什么区别?
She looks as if she knew all about it 这里就用的虚拟语气 与现在相反

答案

本题目seeing是个非谓语动词的形式,不是时态,不是现在进行时态
He stared me as if seeing me for the first time.是个简短句.
你所列举的例句She looks as if she knew all about it 是个虚拟语气的句子.
如果把本题目改成虚拟语气的话,应该是:
He stared me as if he had seen me for the first time.这句话是个从句