表示星期几或某一特定的日期，用on.on sunday.在星期天。例句：Would you like to come for drinks on Sunday? 星期天来参加酒宴好吗？
Sunday例句
1、Sunday is a normal working day for me.
星期日是我的正常工作日。
2、We walked off a heavy Sunday lunch.
我们星期日午餐吃得特别多，散散步帮助消化。
3、The final part will be shown next Sunday evening.
最后一集将于下星期天晚上播出。
4、It's a bit off expecting us to work on Sunday.
让我们星期天上班工作，那可不太行吧。
5、Most weeks, Sunday is my only day off.
大多数时候，我只有星期天才休息。