用英语怎么说几点整了?

five o'clock
数字+ o'clock
发音和 or clock同

具体时间+o'clock

seven 'clock 7点整

在数字后加o'clock.
例如，3点：3 o'clock 或 three o'clock

时间+sharp
It's three sharp!

...o'clock sharp (trust me, this is what foreigners would say)