一.概念:
介詞表示它后面的名詞或相當于名詞的其他結構與句中其他成分的關系.
二.相關知識點精講
1.表示地點位置的介詞
1)at ,in, on, to
at (1)表示在小地方; (2)表示“在……附近,旁邊”
in (1)表示 在大地方; (2)表示“在…范圍之內”。
on 表示毗鄰,接壤
to 表示在……范圍外,不強調是否接壤
He arrived at the station at ten.
He is sitting at the desk.
He arrived in Shanghai yesterday.
Jiangsu lies in the east of China.
Russia lies on the north of China.
Fujian is to the south of Jiangsu Province.
2)above, over, on 在……上
above 指在……上方,不強調是否垂直,與 below相對;
over指垂直的上方,與under相對,但over與物體有一定的空間,不直接接觸。
on表示某物體上面并與之接觸。
The bird is flying above my head.
There is a bridge over the river.
He put his watch on the desk.
3)below, under 在……下面
under表示在…正下方
below表示在……下,不一定在正下方
There is a cat under the table.
Please write your name below the line.
2.表示時間的介詞
1)in , on,at 在……時
in表示較長時間,如世紀、朝代、時代、年、季節(jié)、月及一般(非特指)的早、中、晚等。
如 in the 20th century, in the 1950s, in 1989, in summer, in January, in the morning, in the night, in one’s life , in one’s thirties等。
on表示具體某一天及其早、中、晚。
如on May 1st, on Monday, on New Year’s Day, on a cold night in January, on a fine morning, on Sunday afternoon等。
at表示某一時刻或較短暫的時間,或泛指圣誕節(jié),復活節(jié)等。
如at 3:20, at this time of year, at the beginning of, at the end of …, at the age of …, at Christmas, at night, at noon, at this moment等。
注意:在last, next, this, that, some, every 等詞之前一律不用介詞。如:We meet every day.
2)in, after 在……之后
“in +段時間”表示將來的一段時間以后;
“after+段時間”表示過去的一段時間以后;
“after+將來點時間”表示將來的某一時刻以后。
My mother will come back in three or four days.
He arrived after five months.
She will appear after five o’clock this afternoon.
3)from, since 自從……
from僅說明什么時候開始,不說明某動作或情況持續(xù)多久;
since表示某動作或情況持續(xù)至說話時刻,通常與完成時連用。
He studied the piano from the age of three.
They have lived here since 1978.
4)after, behind 在……之后
after主要用于表示時間;
behind主要用于表示位置。
We shall leave after lunch.
Lucy is hiding behind an old house.