1、字母组合oo读/u:/的单词：
food, mood 心情、语气
roof , proof n. 证明, water proof 防水的, shock proof 防震的, hoof (牛、马的)蹄子, woof n. 低吠声
fool 傻瓜, foolish 愚蠢的, pool 池塘, swimming pool 游泳池, tool 工具, school, school master 校长, stool 凳子
broom 笤帚, boom (商业等的)繁荣, loom 织机, bloom(花)盛开, gloomy昏暗的
moon, noon, afternoon, soon, spoon 调羹, cartoon 卡通, balloon 气球, typhoon台风
troop, loop n.环、圈, hoop n.铁环, droop v.低垂, scoop 勺, snoop v. 探听
swoop猝然下降、猝然攻击, whoop n. 哮喘声, whooping-cough 百日咳
choose v. 挑选, goose n. 鹅, loose 松的, moose麋鹿, noose 绞索
boost vt.吹捧、促进, rooster公鸡
boot 长靴, root 根, shoot 射击、投篮, loot v. 掠夺, hoot v. 鸣笛、狂笑, scooter 小轮摩托车, shooting star 流星
tooth, toothpaste 牙膏, toothpick 牙签, smooth 光滑的, telephone booth 公共电话亭, sooth n./adj.抚慰(的) , soothe vt.安慰
groove n.凹槽、沟； snooze n./vi. 小睡
too, zoo 动物园, zoology 动物学, bamboo 竹子, moo 牛的叫声, shoo (驱赶禽类的)嘘声, kangaroo 袋鼠
2、字母组合 oo 读 /ʊ/ 的单词：
book, cook, hook 钩子, look, took, shook, brook 溪流、小河,
cookies 小点心, notebook 笔记本, handbook 手册, good, hood n. 兜帽、防护罩, wood, wooden, stood, understood,
goods 商品、货物, woods 树林,
neighborhood 邻里, childhood 童年时代
wool 羊毛, woolen,foot, football, foot step 脚步, soot 煤烟、烟灰
3、字母组合oo在极少数情况读/ʌ/音：
blood 血液, blood pressure 血压, blood vessel 血管, blood type 血型, blood plasma 血浆, bloodshed n. 流血、杀戮,
flood 洪水、水灾, flooding 充溢、泛滥, floodlight 泛光灯, flood tide 涨潮