在英文中，"起初"可以用 "at first" 来表示。这个短语的意思是"最开始，刚开始"。

例句：

At first, I was skeptical about the idea, but after thinking about it more, I reapzed it was a good one. (起初，我对这个想法持怀疑态度，但是经过更多的思考后，我意识到这是一个好主意。)
At first, we were very happy. (起初，我们非常开心。)

另外，"很开心"可以用 "very happy" 来表示。这个短语的意思是"非常开心，非常高兴"。

例句：

I'm very happy to see you. (看到你我非常开心。)
She was very happy when she won the award. (当她获得奖项时，她非常开心。)