happy的三种形式

happy就是形容词；副词是happily；名词是happiness

1.happiness n.幸福，高兴，恰当，合适

2.happy adj. （感到或显得）愉快的，高兴的；幸福的，美满的；〈非正式〉滥用…的，胡乱使用…的

3.happilyadv.快乐地;高兴地;满足地;幸运地;欣然;情愿地

例句with infinitive]they are happy to see me doing well. 他们看到我进展顺利很是高兴。

Remember, happiness doesn\'t depend upon who you are or what you have; it depends solely upon what you think.--Dale Carnegie 请记住，幸福不在于你是谁或者你拥有什么，而仅仅取决于你的心态！

A little bird was singing happily in the tree. 小鸟在树上快乐地歌唱。