8:00用英文怎么说

"8:00" 在英语中可以说作 "eight o'clock"。

"o'clock" 是 "of the clock" 的缩写，意思是 "钟的，钟表的"。

例句：

I have a meeting at eight o'clock this morning. (我今天上午8点有个会议)
The store opens at eight o'clock. (商店8点开门)
Can you be ready by eight o'clock? (你能在8点前准备好吗？)