祝我们生日快乐用英文表达是：Happy birthday to us；

Happy：adj. 感到(或显得)快乐的; 高兴的; 给予(或带来)快乐的; 使人高兴的; 幸福的; 表示祝愿。

birthday：n. 生日。

Let's go to say happy birthday to him.

让我们去对他说声生日快乐。

We are of one family, happy birthday!

我地系一家人来架嘛！

Happy birthday, my best friend, I love you.

生日快乐，攸，咱爱你。

Happy birthday to you, Would like your life is always colorful!

祝你生日快乐，愿你的生活永远多姿多彩！

People usually sing "Happy Birthday" at the party.

人们在生日派对上常说“生日快乐”。