3点的英文是three o'clock。
例句：
一、It is a few minutes off three o'clock.
还有几分钟就三点了。
二、The clock said three o'clock.
时钟显示三点整。
三、It's three o'clock in the morning.
现在是凌晨3点整。
四、Having to get up at three o'clock every morning was the least of her worries.
她发愁的事多着呢，相比之下，每天早上3点就要起床根本就不算什么。
五、The twins made their appearance at three o'clock. Spot on time.
双胞胎在3点时出现了。绝对准时。
