第1个回答 推荐于2016-10-08
fast即可作形容词也可作副词,都用来描述具有物理性质的、量化的“速度、速率”的快慢,如:
Tom runs faster than Peter.
4m/s is faster than 2m/s.
而quickly只用作副词,多用来形容无量化的快慢,如:
Quickly Tom! Come here! (which means: Tom! Come here quickly!)
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