/ˈmɔ:nɪŋ ||; ˈmɔrnɪŋ/noun[C,U] 1 the early part of the day between the time when the sun rises and midday 早晨；上午；早上: Pat's going to London tomorrow morning. 帕特将于明天早上去伦敦。Bye, see you in the morning (= tomorrow morning). 再见，明天上午见。I've been studying hard all morning. 整个上午我都在用功。Dave makes breakfast every morning. 戴夫每天早上都做早餐。She only works in the mornings. 她只在上午工作。
2 the part of the night that is after midnight 午夜至日出的一段时间；凌晨: I was woken by a strange noise in the the early hours of the morning. 我在凌晨时分被奇怪的声音惊醒。He didn't come home until three in the morning. 他凌晨三点钟才到家。
When you use the adjectives early or late before ‘morning’, ‘afternoon’ or ‘evening’ you must use the preposition in The accident happened in the early morning. We arrived in the late afternoon. With other adjectives, use on School starts on Monday morning. They set out on a cold, windy afternoon. No preposition is used before this, tomorrow, yesterday Let's go swimming this morning. I'll phone Liz tomorrow evening. What did you do yesterday afternoon? morning﹑afternoon或evening前面用形容词early或late时﹐必须用介词in﹕The accident happened in the early morning.事故发生在清晨。We arrived in the late afternoon.我们于下午较晚的时候抵达。与其他形容词连用时﹐则用on﹕School starts on Monday morning.学校于星期一早上开始上课。They set out on a cold, windy afternoon.他们在一个寒风凛冽的下午出发。前面用this﹑tomorrow﹑yesterday时则不加任何介词﹕Let's go swimming this morning.我们今日早上一起去游泳吧。I'll phone Liz tomorrow evening.明晚我会打电话给利兹。What did you do yesterday afternoon? 昨天下午你干什么来着﹖ Good morning(
formal 正式) used when you see sb for the first time in the morning （早上初次见面时的问候语）早，早安
☞In a less formal situation we just say Morning Morning Kay, how are you today? 非正式场合只说Morning：Morning Kay, how are you today?早安，凯，今天好吗？