英语好的帮忙谢谢.很简单其实但我不会

Party time:At 7:00 at night on last Sundy evening
Participant: all students and some were invited teachers
Activity content: played the piano, played the guitar, the girls sang a song, the boys performanced skits,class dancing.
（话说,楼上这位有很多语法错误啊）