以u开头的单词加a

词首的 U 发【j】音时,前面用 a ,例如 a university,a used car,a usual day 等；

词首的 U 不 发【j】音时,前面用an，例如 an uncomfortable chair,an ugly child 等.

例句

Is there a university in this town?

这座城市有没有大学？

His behaviour is unbefitting of a university professor.

他的\'行为与大学教授的身份不相符。

It\'s a usual day.

今天是平常的一天。

Would you buy a used car from this man?

你会从这个人手里买一辆旧车吗？

She has a used car.

她有一部旧车。