英语翻译He opened his lips as if he were to make some reply.请标准翻

首先,这就是真唱的虚拟语气形式.
在虚拟结构中,无论主语是第几人称,be 动词一般一律用were.只是,在口语或非正式文体中,有时会用was代替were.例如：
How I wish I were a bird!
If I were you, I would try my best to make my dream come true.
If he were wise enough,he would take our advice.
其次,你所给的句子,【He opened his lips as if he were to speak.】,这里面虚拟语气用法正确.
句意：他当时张开口/开启嘴唇,好像要讲话/似乎准备说话.
按照语义,【准备说话】应该是【开启嘴唇】后的动作,而不应该在这个动作之前发生,因此,不能用完成式.
祝你开心如意!O(∩_∩)O~~

他张开嘴，好像要做出回答。