umbrella和use发音一样吗

不相同，use里u发的是字母音，un是一个前缀组合，一般表示否定的，这里这个单词怀疑你想写的是umbrella，雨伞。不过un和umbrella都发的是ʌ的音

put [英] [put] [美] [pʊt]

umbrella [英] [ʌmˈbrelə] [美] [ʌmˈbrɛlə]

use [英] [ju:z] [美] [juz]

poor [英] [puə] [美] [pʊr