foot跟feet有什么区别

具体指脚时或英尺时的复数，就用feet如How many feet do you have?I have is 6 feet ：用在短语中或构成一些词：如on foot步行，也可用with feet（但不是步行，而是用脚的意思），但不用with foot的footballfootprint脚印如I often go home on hing with fists and kicking with feet are allowed in taekwondo.跆拳道允许用拳击和用脚踢。