晒月光“a couple walk in the moon light”means they are sharing their time together at night 压马路“they walk on the road again and again that make the road smooth”it means they consume time by walking and chatting. say, your roommate Jack get back at 9 pm with a girl,you can say "ni you qu shai yue guang le?"means you are dating with sb. again. if you wanna have a drink with your friend bob,however he said i am sorry.you can say "jia ren you yue a"(佳人有约啊) means he has a date. wish this can help you