used to say hello politely when people first see each other in the morning; sometimes also used formally when people leave each other in the morning （上午见面时用语，非正式场合常说 Morning）早上好，上午好，你（们）好；（有时用作上午告别时的正式用语）再见 He didn't even say ‘Good morning’. 他甚至连“早上好”都没说。