Richard and Mary, I think they are seeing each other.我觉得Richard和Mary在约会。

　　seeing someone 与某人约会

　　I am seeing someone at the moment. 我有男（女）朋友。

　　going out with someone 与某人约会

　　Office Romance 办公室恋情

　　Sean: Hold on, where are you going? We are in the middle of a meeting. 等会儿，你去哪啊？我们会开了一半儿。

　　Michelle: I have a date with my dentist in 30 minutes. 我半小时后和我的牙医有约。

　　And I have another date with my vet in the afternoon. 下午还约了我的兽医

　　And I also have another date with the police officer in the evening. 晚上我还约了警官呢。

　　Sean: You have three appointments today. 你今天有三个预约。

　　have an appointment with someone 与某人预约好了

　　Will you be available between 3 and 3:30 next Monday? 你下周一3点到3点半之间有空吗？

　　Sean: I have tickets for concert. Will you be available tomorrow evening?我有两张演唱会的票，你明天晚上有空吗？

　　Michelle: What time? 什么时间呢？

　　Sean: 7 p.m. Can you make it? 晚上7点，你能来吗？

　　Michelle: I'd love to, but I have a date. Maybe next time. 我很想去，但是已经有约了。下次吧！