两者都可以表示走路,但是on feet一般在句子中做状语,如：He goes to school on feet；而walk是动词,一般做谓语,如：He walks to school,二者是同义句.另外,walk也可以做名词,具体如下：1.走;步行;散步[C]
She used to take a walk after supper.
她过去常在晚饭后散步.
2.步行距离[S]
The bank is a ten minutes' walk from here.
银行从这里走过去十分钟就到.
3.步法,步行姿态[S]
I knew her by her walk.
我从走路的姿势看出是她.
4.步行场所;人行道[C]
5.【棒】四坏球自由上垒[C]
