会开心用英语怎么说

在英语中，表示 "happy" 的常用词有 "happy" 和 "glad"。
"Happy" 是一个形容词，源自中世纪英语 "hap"，意思是 "幸福的" 或 "顺利的"。例如：
I'm happy to see you. (我很高兴见到你。)
She was happy with the results of the exam. (她对考试的结果感到满意。)
"Glad" 是一个形容词，源自古英语 "glæd"，意思是 "高兴的" 或 "欣喜的"。例如：
I'm glad to hear that you're doing well. (听到你过得很好我很高兴。)
She was glad to have finished the project on time. (她很高兴能按时完成项目。)
你也可以使用其他形容词来表示 "happy"，比如 "content" (满意的)、"joyful" (愉快的)、"pleased" (高兴的) 等。例如：
He was content with his life. (他对自己的生活感到满意。)
She was joyful when she received the news. (她收到消息时很高兴。)
I'm pleased to see you again. (很高兴再次见到你。)
希望以上给你的回答能帮助到你。