happy的副詞和名詞分別是什麼?

例句：

Albert leaned back happily and lit a cigarette.

艾伯特開心地向後斜靠着並點燃一支香煙。

The children were playing happily with their toys.

孩子們正高興地玩着玩具。

She married the prince and they lived happily ever after.

她與王子成了婚，從此過着幸福的生活。

Money is not essential to happiness.

金錢對於幸福並非必不可少。

She found happiness in her later years.

她在晚年才尋得幸福。

'Happiness' is a derivative of 'happy'.

happiness是happy的派生詞。