常+时间点
before
He must be back home before 10
介词
till/until
用法
表示“到……为止;直至”。
举例
He didn’t leave the office until 12 o’clock. (非延续性动词) Let’s stay here till tomorrow. (延续性动词)
she decided to do. 她知道, 无论她决定做什么,她的家人肯定会支持她。
妙辨异同:in front of/in the front of/in front
in front of:表示“在……前面”, 为介词短语, 指在某人/物体前 面。
in the front of:表示“在……前部”,为介词短语,指在某一物体 内部的前面。
above 表示“在……上方; 在……之上”,不一定在正上方,反义词为
below; over 表示“在……的上方”,强调位于物体正上方,反义词为under(两个 物体间有接触或无接触); on 表示“在……上”,强调两个物体间有接触; against 表示“倚; 靠; 撞”。
A plane is flying above us. I could hear the noise in the yard below my window. There are many books on the shelf. There is a bridge over the river. There is a ball under the teacher’s desk. Bob sat down against a tree.
in front:表示“在前面”,为副词短语。walk in front 走在前面