英语中不乏用来表达酸甜苦辣的单词，它们是必学的基本词汇，就像表达开心，我们常用 happy，当然类似的单词数不胜数，如 joyful，delightful，pleased，excited 和 glad 等等，但这些都是基本的描述，其中一些是分词形容词。
happy:
You don't very happy today.
你今天好像不太高兴。
joyful:
The delegation brought a piece of joyful news.
代表团带来了一则令人高兴的消息。
delightful:
It was the most delightful garden I had seen.
这是我所见过的最惹人喜爱的花园。
excited:
The children were excited about opening their presents.
孩子们对打开礼物感到兴奋不已。
pleased:
She was very pleased with her exam results.
她对考试成绩非常满意。
glad:
I'm glad to meet you. I've heard a lot about you.
很高兴见到你。久闻大名。
今天给大家介绍一个高级的表达方式，它就是 walking on air 或 floating on air，意为“兴高采烈，非常高兴，心满意足”等，例如：
I have been walking on air I found out that I have been awarded a scholarship to study music.
自从我得知我获得了学习音乐的奖学金后，我就一直非常高兴。
She has been walking on air since getting engaged last week.
自从上星期订婚后，她一直非常开心。
Ever since she met Mark, she's been walking on air.
自从遇见马克以来，她一直心满意足。
She was feeling like walking on air after hearing the news of her passing the exams.
听到她考试及格的消息后，她感到高兴极了。
Mary was floating on air after she won first prize.
玛丽得了一等奖后，兴高采烈。
Walking on air 或 floating on air 相当于另外一个习语 on cloud nine 或 on cloud 9，估计是那种开心到飘到九霄云外的感觉，例如：
Ever since Mary got her promotion at work, she's been on cloud nine. I don't think I've ever seen her happier!
自从升职以来，玛丽就一直在欣喜若狂。我想我从来没有见过她这么快乐！
When I got my promotion, I was on cloud nine.
当我升职时，我非常高兴。
I never expected to win, so I'm on cloud nine.
我从来没想过会赢，所以非常兴奋。
开心是一种好心情的表现，所以可以使用 in a good mood 来表示开心愉快的状态，例如：
He was not in a good mood that day.
他那天心情不好。
She's in a good mood today.
她今天心情很好。
Luckily I was feeling in a good mood.
幸好我当时情绪好。
当然不同阶段学习的词汇的难易程度不一样，表达开心还可以使用一些相对比较少用的或用于特别的地方的单词，如 elated，ecstatic，cheerful 和 contented 等等，例如：
elated [iˈleɪtɪd]:
We were elated at the news.
听到这个消息我们兴高采烈。
They were elated at the result.
他们对这一结果感到欢欣鼓舞。
ecstatic [ɪkˈstætɪk]:
The new president was greeted by an ecstatic crowd.
新总统受到欣喜若狂的人群的欢迎。
Sally was ecstatic about her new job.
萨莉对她的新工作高兴得发狂。
cheerful [ˈtʃɪəfl]：
She's always very cheerful.
她总是很高兴。
They are both very cheerful in spite of their colds.
他们俩虽然感冒了，可都兴高采烈的。
contented:
She's a very contented little baby.
她是个很知足的小宝宝。
Whenever he returns to this place he is happy and contented.
每次回到这个地方，他都十分快乐，心满意足。
我相信表示开心高兴的表达方式还有很多。其实英语水平的高低也部分取决于你的知识库，所以要坚持学习和日积月累。
关注外语行天下，后期会更精彩。
