contrary to位于句首,是什么结构,做什么成分 比如 Contrary to

下面这个句子里Contrary to popular belief是什么成分 to the contrary 和on the contrary有什么不同 Contrary to popular belief contrary to widespread belief 有没有be on the contrary to的用法?contrary与contradictory有什么区别不? in contrast to和in contrary to 有什么差别? 比较on the contrary ,to the contrary与contrary to的用法 请问“Despite assurances to the contrary, notwithstanding anything to the contrary何意? But despite some claims to the contrary, 英语造句（用contrary to） 分别用to the contrary,to the contrary造句,我老是分不清它们的区别,