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小囡1234
fast 本身就是副词。。。
小库2011
He goes so fast that the old man can not follow him.
王者堕落天使
He walks so fast that the old can't follow him.
纯度装饰
How fast he is running 或者what a high speed he is running at
蝶澈0825
在这里fast作副词来修饰动词Walk
annywong1990
He walk so fast that the old man can not follow him...
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