Question

6. If I        out to swim in the river this morning, he would not be in hospital now. (stop)

如果我今天早上阻止他外出去河里游泳的话，他现在就不会躺在医院里了。

Answer 1

6. had stopped him (from) going考査虛拟语气的用法。对过去事实的虛拟中，从句用过去完成时。阻止某人做某事stop sb. (from)  doing sth.。