夸克编写组在他们合作编著的《A Grammar of Contemporary English》中对此问题有过论述：
He treats me as if I'm / I were a stranger.
The use of the hypothetical past makes little difference here, since both the present and past form imply the unreality of what is expressed in the subordinate clause; it is assumed from both sentences that' I am not a stranger'.
所以，这里的陈述语气依然表示的是反事实。也可以说 I feel as if l had been born again.（虚拟语气）
此外，这个问题曾经在本网讨论过。可参考：https://www.cpsenglish.com/question/55855
仅供参考。
