When is it convenient for you? 你什么时候方便? About what time? 什么时候? Whenever. 什么时候都行。 When you have time. 等你有时间的时候吧。 I'm free today. 我今天有空。 I'll be busy tomorrow. 明天我会很忙。
How about the tenth? 10号怎么样? When are you free? 你什么时候有空? That's a bad day for me. 那天我不行。 That day is fine. 那天我可以。 When can I come over? 我什么时候去合适? You decide when. 你定时间吧。 You decide where. 你定地点吧。 Is seven convenient for you? 7点行吗? When can you come over? 你几点能来? Is it too early? 太早了吗? Is it too late? 太晚了吗? It's a date. 就那个时间吧。 See you then. 回头见。