happily是副词词性。作为副词，happily的基本含义有“快乐地”、“高兴地”、“满足地”、“幸运地”、“欣然”、“合适地”、“情愿地”，用于修饰动词。

happily作为副词，意为快乐地;高兴地;满足地;幸运地;欣然;情愿地;合适地，后接动词。

例句：A little bird was singing happily in the tree.

小鸟在树上快乐地歌唱。

I think we can manage quite happily on our own.

我想我们自己完全能够应付。

This suggestion did not fit very happily with our existing plans.

这个建议与我们目前的计划不十分契合。

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。

She skipped happily along beside me.

她连蹦带跳，高高兴兴地跟着我走。

The canary was trilling away happily.

那只金丝雀唧唧啾啾地欢唱个不停。

I think these books can stand comparison quite happily with works by Dickens

我认为这些书能和狄更斯的作品相媲美。

The last I heard, Joe and Irene were still happily married.

我最近一次听说时，乔和艾琳仍然是一对快乐的夫妻。

She would happily trot behind him as he set off to commune with nature.

他出去亲近大自然的时候，她就会一路小跑，快活地跟在他后面。

I could happily move back into a flat if it wasn't for the fact that I'd miss my garden

如果不是因为我会想念自己的花园的话，我会很乐意搬回公寓住。

At the other tables couples were now in a mellow mood, chattering happily and drinking.

其他桌上的情侣们正一边饮酒一边畅谈，兴致很高。

Since their marriage, the young couple has been living happily.

结婚之后，这对年轻的夫妻过着幸福的生活。

The inhabitants of mountainous regions live more happily than ever before.

山区居民的生活比过去幸福多了。