(3)from, since 自从
from仅说明什么时候开始,不说明某动作或情况持续多久;
since表示某动作或情况持续至说话时刻,通常与完成时连用。
例句:He studied the piano from the age of three.
They have lived here since 1978.
(4)after, behind 在之后
after主要用于表示时间;
behind主要用于表示位置。
例句:We shall leave after lunch.
Lucy is hiding behind an old house.三、表运动方向的介词:
across, through 通过,穿过
across表示横过,即从物体表面通过,与on有关;
through穿过,即从物体内部穿过,与in有关。
例句:She swam across the river.
He walked through the forest.
四、表示在之间的介词:
between, among
between指在两个人或两个事物之间;
among指在三个或三个以上的人或事物之间。
例句:There is a football match between Class One and Class Two on the playground.
The teacher is standing among the students.
五、表示其他意义的介词:
(1)on ,about 关于
on 表示这本书,这篇文章或演说是严肃的,或学术性的,可供专门研究这一问题的人阅读;
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