说用英语怎么说：

Happy birthday! I said to myself.

生日快乐！我对自己说。


Happy birthday to me.

：

lowerone'svoice;speakunderone'sbreath两个都可以。例句：那位男子靠近了一步，压低声音。The man moved closer, lowering his voice 《柯林斯高阶英汉双解学习词典》2不知怎么的，他觉得自己必须得压低声音。For some reason he felt constrained to lower his voice. 希望对你有帮助！

说用英语怎么说教程：

I said to myself，一般都习惯这么说，就像汉语里为什么不说“我对我说”而是“我对自己说”。