语法是英语学习的基础，也是英语六级考试的基础，掌握好英语语法无论是对六级考试还是以后的英语学习都是有很大帮助的。下面新东方网英语六级频道为大家整理了英语六级语法常考知识讲解，希望能为大家带来帮助!
2017年12月英语六级语法常考知识讲解汇总
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. (你应该晓得速度限制)
2017年12月英语六级语法常考知识讲解汇总
From:https://www.zgghmh.com/CET-6/20007573.asp