问：sb is walking over the bridge,sb与bridge有接触为什么还用 they are walking over the brid...

sb is walking over the bridge,sb\u4e0ebridge\u6709\u63a5\u89e6\u4e3a\u4ec0\u4e48\u8fd8\u7528ov

On\u53ea\u80fd\u8868\u793a\u5979\u5728\u6865\u4e0a\u8d70\uff0c\u800cover\u8868\u793a\u5979\u8fc7\u4e86\u6865

\u8fd9\u662f\u65b0\u6982\u5ff5\u82f1\u8bed\u7684\u4e00\u4e2a\u5c0f\u8bed\u6cd5\u70b9\u3002\u9488\u5bf9\u4f60\u7684\u95ee\u9898\uff0c\u6211\u505a\u51fa\u5982\u4e0b\u89e3\u91ca\uff1a
\u9996\u5148\uff0cthey
are
walking
over
the
bridge
\u548c
they
are
walking
on
the
bridge\u90fd\u662f\u6b63\u786e\u7684\u3002
over
\u6709\u201c\u7a7f\u8fc7\uff0c\u5728\u3002\u3002\u3002\u4e4b\u4e0a\uff08\u4e0d\u63a5\u89e6\u8868\u9762\uff09\u201d\u7684\u610f\u601d\u3002\u53e5\u4e2d\u7684over\u662f\u201c\u7a7f\u8fc7\u201d\u7684\u610f\u601d\u3002\u6240\u4ee5\u7528over
\u4f1a\u66f4\u597d\u3002
\u5982
go
over,
fly
over,
\u52a8\u8bcd\u548cover\u642d\u914d\u975e\u5e38\u5e38\u89c1\u3002
\u3010\u5982\uff1a
the
aeroplane
is
flying
over
the
river.
\u98de\u673a\u6b63\u5728\u6cb3\u4e0a\u98de\u8fc7\u3002
the
birds
are
flying
over
the
house.
\u9e1f\u513f\u5728\u5c4b\u4e0a\u98de\u8fc7\u3002
over\u8fd8\u53ef\u8868\u4e0d\u201c\u5728\u2026\u2026\u4e0a\u65b9\u201d\uff08\u4e0d\u63a5\u89e6\u8868\u9762\uff09\uff0c\u5982\uff1a
the
sky
is
over
our
heads.
\u5929\u7a7a\u5728\u6211\u4eec\u5934\u9876\u4e0a\u3002
\u3011
on\u6709\u201c\u5728...\u4e0a\u9762\u201d\uff0c
\u9759\u6001\u610f\u601d\u3002\u7f3a\u5c11over\u7684\u52a8\u6001\u201c\u7a7f\u8d8a\u201d\u4e4b\u610f\u3002
\u6240\u4ee5\uff0c\u975e\u5e38\u4e25\u683c\u7684\u6765\u8bb2\uff0c
they
are
on
the
brige(\u4ed6\u4eec\u5728\u6865\u4e0a\uff09,
they
are
walking
over
the
brige\uff08\u4ed6\u4eec\u5728\u8fc7\u6865\uff09.
\u662f\u6b63\u786e\u7684\u3002

两个都对。over强调过桥全过程，因为over有跨过之意。on 表示正在桥上面呢

用on表示在桥上走、用over表示过桥

over还有越过的意思

Walk over有表示走过

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