foot的復數
1、foot 表示“腳”時，其復數為 feet。如：
I wear shoes on my feet. 我腳上穿著鞋子。
He is on his feet for sixteen hours a day. 他每天站16個小時。
He suffers terribly with his feet. 他的腳痛得不得了。
I walked into a pool of water and got my feet wet. 我走近一個水坑，把腳弄濕了。
2、foot 表示“英尺”時，其復數是 feet 或 foot。如：
Jim is six foot [feet] tall. 吉姆6英尺高。
The snow is three foot [feet] deep. 雪有3英尺深。
The tree is six foot [feet] around. 這樹周長6英尺。
The table is six foot [feet] long, or about two meters long. 桌子有6英尺(或2米)
3、但在復合形容詞中通常用單數。如：
a six-foot-tall man 6英尺高的人