Few student found the secret,as had the teacher told much

Few students found the secret,as had the teacher told much尽管老师讲了很多,但鲜有学生发现那个秘密。这是as的特殊用法。as引导的让步状语从句中,动词或助动词要提前,这里把表完成时的助动词HAD提前,并省略了through。 还原原句为 Few students found the secret,as through the teather had told much。