1、show up是动词短语，意思是到场、露面、揭露。
2、I invited him for eight o'clock，but he didn't show up until 9.30。我请他八点钟来，可他直到九点半才露面。
3、We were excepting 30 people to come，but half of them never showed up.我们以为会来30人，但是有一半人根本没有露面。
4、After all,you never know who might show up for the party.毕竟你永远不会知道谁会成为你的客人。
5、show off：炫耀、卖弄。He's always showing off to his classmates.他老是在同学面前炫耀。
