高兴的答应了用英文怎么说

"Agreed happily" 可以说成 "I agreed happily."

来源：这个短语是由 "agree"（同意）和 "happily"（高兴地）组合起来的。

例句：

I agreed happily to help out with the project.
我高兴地同意帮助这个项目。
She agreed happily to go on a date with him.
她高兴地同意和他约会。
He agreed happily to be the best man at his friend's wedding.
他高兴地同意作为他朋友的伴郎。