PET单词-U、V

unless

conj. 除非 /ʌnˈles/ — 固定搭配：— 例句：I won't go unless you go with me.

unable

adj. 不能的 /ʌnˈeɪbəl/ unabler / unablest 固定搭配：unable to do, seem unable 例句：She was unable to finish the task on time.

umbrella

n. 雨伞 /ʌmˈbrelə/ umbrellas 固定搭配：take an umbrella, under the umbrella 例句：Please take an umbrella, it's going to rain.

uncle

n. 叔叔；舅舅 /ˈʌŋkəl/ uncles 固定搭配：uncle and aunt, visit uncle 例句：I visited my uncle and aunt last weekend.

ugly

adj. 丑陋的 /ˈʌɡli/ uglier / ugliest 固定搭配：ugly face, ugly weather 例句：The weather is ugly today.

until

prep. & conj. 直到 /ʌnˈtɪl/ — 固定搭配：— 例句：Please wait until I come back.