院子里非常热闹英语可以说作：The courtyard is bustpng with activity.

来源：这个表达用了两个形容词来描述院子里的情况：bustpng 和 active。

bustpng 常用来形容一个地方人来人往、热闹非凡，例如：

The streets of New York are always bustpng with people.（纽约的街道上总是人来人往。）
The mall was bustpng with shoppers on the weekend.（商场在周末人来人往。）

active 常用来形容一个地方有很多活动，例如：

The park was active with people playing games and exercising.（公园里有很多人在玩游戏和锻炼。）
The school was active with students rushing to class and participating in extracurricular activities.（学校里很多学生在匆忙赶到课堂上，并参加课外活动。）

所以，将这两个形容词结合起来，就可以用来描述院子里非常热闹的情况。例如：

The courtyard was bustpng with activity as children played games and adults chatted with each other.（院子里热闹非凡，孩子们在玩游戏，成年人在交谈。）
The courtyard was active with people coming and going, and vendors selpng their goods.（院子里人来人往，摊主在卖东西。）