《牛津英语用法指南》第三版519.4原文如下：“should have + 过去分词可以用来谈过去未发生，或本会（或本不会）发生的事情。I should have phoned Ed this morning , but I forgot . 今天上午我本该给埃德打电话，但是我忘了。Ten o'clock : she should have arrived in the office by now . 十点钟：现在她应该到办公室了。You shouldn't have called him a fool —— it really upset him . 你不应该叫他笨蛋 —— 这让他特别不高兴。”如果 “Isn’t it strange that he should have left without telling us. ”中的should have left 是这种用法，译文应该是“ 真奇怪，他本该没说一声就走的。 ”这符合常理吗？