介词是in，例如：
1、The previous year Adolphson had starred in a play in which Ingrid had been an extra上一年，阿道夫森在一部戏剧里担任主角，当时英格丽在剧中还只是个临时演员。
2、I did it the first time I went to see you in a play.我第一次去看你演出时就用过。
3、He rose at 7 a.m.， rehearsed all day and appeared in a play at night.他七点钟起床，排了一天戏，晚上演出。
