"He is happy" 可以用英语表示为 "He is happy."
"Happy" 是一个形容词，意思是 "快乐的"。这个词来自中世纪拉丁文 "fepx"，意思是 "幸福的"。
下面是一些用 "happy" 这个词的例句：
"I'm so happy to see you again!"（看到你再次面对面真是太开心了！）
"She has a happy disposition and always sees the bright side of things."（她性格开朗，总是从好的方面看事情。）
"He was happy to hear that he had been accepted to his dream college."（他很高兴听到自己被他梦想中的大学录取了。）