
在早上用in。在早上英文是In the morning。In the morning的例句I could have done without being woken up at three in the morning(其实用不着在凌晨三点钟就把我叫醒)。
In the morning的例句There was music and dancing till two in the morning(音乐和舞蹈一直持续到凌晨两点);I want to make an early start in the morning(我想早上早点出发)。