有几种表达方法供你参考：1.halfpast two两点半；2.two thirty两点三十分；3.thirty to three差三十分钟三点。
例句
1、I'm sorry, sir, but our lunch specials go off at half past two. We can only serve refreshmentsnow. Would you prefer something like that?
抱歉，先生。但是我们中餐的各种菜肴在两点半就卖掉了。我们现在只有点心。您想来一点吗？
2、I reached my destination around half past two.
我大约两点半到达了目的地。
3、In the afternoon, I have art at half past one and I have an English lesson at half past two.
下午一点半我们上美术课、两点半上英语课。
4、How about half past two tomorrow afternoon?
明天下午两点半，怎么样?。
5、I passed the food shop at half past two and bought you the chocolate.
我两点半路过食品店，给你买了巧克力。