今天上午八点他正在看故事书。

He was reading story book at eight o, clock.

youdao

上午八点之前你在商店里是买不到东西的。

You can't buy them in the shop before eight o'clock.

youdao

到昨天上午八点为止，我已读完了这本书。

I had finished reading the book by eight a. m. yesterday.

youdao

Don't forget sections start tonight at seven o'clock and there's another set at eight o'clock and then Friday afternoon at one thirty and Monday morning.

别忘了课后讨论会今晚七点开始,还有几场分别在今晚八点,周五下午一点半和周一上午

耶鲁公开课 - 聆听音乐课程节选