1.表示高兴的原因,其后可接不定式、that从句、介词at,about等。
He was happy to be coming home.
就要回家了他感到高兴。
I'm happy at his letter.
收到他的信我很开心。
2.表示“对...满意”,其后接介词with.
Happy New Year.
新年快乐。
Happy Thanksgiving,everyone!
祝大家感恩节快乐!
3.表示自己感到开心或幸福,也可表示某事物令人感到高兴或幸福。
happy smile 幸福的微笑
a happy ending 圆满的结局
4.sb. is happy to do sth. 某人乐于做什么事
We are happy to help you. 我们乐于(愿意)帮助你
sb. is happy with sth. 某人乐于什么事
I am happy with my exam scores. 我对我的考试成绩满意
sb. is happy in doing sth. 某人乐于做什么事
He is happy in helping others. 他乐于帮助他人