如果你需要帮助，我很乐意帮忙。

I'd be very ___happy ___to help, if you need a hand.

我很乐意帮助你筹备音乐会。

I would be very ___happy ___to help you with the concert.

她总是乐意和朋友们分享她的玩具。

She is always ___happy ___to share her toys with her friends.