快乐的副词英语表达是：happily；
happily：adv.快乐地;高兴地;满足地;幸运地;欣然;情愿地。
相关介绍This suggestion did not fit very happily with our existing plans.
（图片来自网络侵删）
这个建议与我们目前的计划不十分契合。
I'll happily help, if I can.
如果我能帮忙，我倒很乐意。
She married the prince and they lived happily ever after.
她与王子成了婚，从此过着幸福的生活。
The children were playing happily with their toys.
孩子们正高兴地玩着玩具。
And they all lived happily ever after.
从此以后他们都过着幸福的生活。
