Many happy returns of the day!

祝你生日快乐！

May I wish you many happy returns of the day.

谨祝您生日快乐！

Here is a present for you.

这是给您的礼物。

I'd like to present this book to you.

我想把这本书送给你。

I bought an album for you.

我给你买了一本影集。

I don't know how to thank you for your gift.

你送我礼物，真不知道该怎么谢你。

It's very kind of you.

您真好！