语法是英语学习的基础，也是的基础，掌握好英语语法无论是对还是以后的英语学习都是有很大帮助的。下面小编为大家整理了常考知识讲解，一起来学习一下吧! 英语常考知识点讲解：动词语态。可以有两种被动结构的类型。
　　例如:
　　He was said to be jealous of her success. It was said that he was jealous of her success. 能同时适用于上述两个句型的主动词通常都是表示“估计”,“相信”等意义的动词,常见的有assume,believe,expect,fear,feel,know,presume,report,say,suppose,understand等.
　　It is supposed that the ship has been sunk. The ship is supposed to have been sunk. 担当be supposed to 与不定式的一般形式搭配时往往表示不同的意义.
　　例如: Why are you driving so fast in this area? You are supposed to know the speed to know the speed limit. (你应该晓得速度)