5. We kicked the shuttlecock at sunset.
我们在日落时踢毽子。
还能这样说：
We kicked the shuttlecock at dark.
We kicked the shuttlecock at sunset.
应用解析：
sunset 其他常用的意思有：日落的景象;西方;末尾，晚年，衰退期。
例如：He is now in the sunset of his day. 他已步入晚年。
6. He astonished us by kicking the shuttlecock at midnight.
他在午夜踢毽子，这真让我们吃惊。
还能这样说：
He startled us by kicking the midnight shuttlecock.
We were surprised at his kicking the shuttlecock in the middle of the night.
应用解析：
be astonished at sth. 对某事感到惊讶。
例如：We were astonished at the news of her sudden death.
我们对她的突然死亡感到惊讶。
7. We are playing with the shuttlecock shoulder to shoulder.
我们肩并肩踢毽子。
还能这样说：
We are kicking the shuttlecock side by side.
We are kicking the shuttlecock abreast.
应用解析：
a shoulder to cry on 能提供慰藉的人，所祈求的同情;
be up to one's shoulders 深深地陷于;工作忙得不可开交
8. Kick the shuttlecock with your ankle every time when it is falling down.
每次当毽子落下时，你就用脚踝踢它。
还能这样说：
Use your ankle to kick the shuttlecock each time when it falls down.
When the shuttlecock drops, you need kick it with your ankle.