虚拟语气中but放在had he后面什么意思，详细解释下but的意思？

Question

例句： Had he but recognized the seriousness of the situation before,he would,no doubt have acted more proudly.

Answer 1

这里的but是一种俚语的用法用于强调“一定”
他一定是提前知道了事情的严重性，要不然他一定会更加高傲的。

Answer 2

你好。根据句意，but == only if :
He would,no doubt , have acted more proudly ONLY IF he had recognized the seriousness of the situation before本回答被网友采纳

Answer 3

only 的意思。