The prepositions across and over
are often used with similar meanings, but there are some
1 They can both be used to mean
'on or to the other side of a
line, river road, etc' (position or movement related to things that
are 'long, and thin').
二者用来表示‘on the other side of a line（在对面）’或‘to the other side
We walked over/across the road. （我们走到马路对面）
See if you can jump over/across the stream.（看你是否可以跳到小河对面）
His room's just over/across the corridor.（他的房间正好在走廊对面）
We'll be over/across the frontier by midnight.
Over is used for movements on or above water, but
not in water.
How long would it take to swim across the river? (Not: *... over the river?)
游过这条河要多长时间？（不是：*... over the
across and over can mean'on the
other side of' a high barrier (like a hedge, a fence, a wall, a
mountain range), but only over is used for a movement to the other side
of something high.
If we can be over/across the fence before sunrise we've got a
When I last saw him he was climbing very slowly over the
(Not: *... across the
Both across and over can be used
for movement inside an area (for example
desert, a dance-floor).
Who are those people wandering over/across the
However, when we mean 'from one side to the other of the area', we
It took him six weeks to walk across the desert. (Not: *...
over the desert.)（他用六周穿越了那片沙漠）（不是：*... over the desert.）
And over is not normally used for movement in a
three-dimensional space (like a room).
He walked across the room, smiling strangely. (Not: *... over the room ...)他穿过房间，笑得奇怪。（不是：*... over
the room ...）
Note that the adverb over has a wider meaning than
the preposition over.
say *Let's swim over the river to the
church, but you can say Let's swim over to the
注意：副词over比介词over的意思多些。不能说‘*Let's swim over
the river to the church,’但是可以说‘Let's swim over to the