If my lawyer had been here last Saturday,he would have prevented me from going.句子分析.
问题描述：
If my lawyer had been here last Saturday,he would have prevented me from going.句子分析.
为什么从句是过去完成,而主句是现在完成呢?THKS!
答
句意为 如果我的律师上个周六在这儿,他会阻止我离开.
主句里有“Would”,Would为情态动词will的过去式,故后接动词原形.
不懂还可以问我哦.O(∩_∩)O~你好。 have prevented 不是现在完成时的标志吗？不是标志，标志是since之类的。这是现在完成时。如果没有would，就用had prevented .