Am I to understand that you refuse?

你是告诉我你拒绝了？

《牛津词典》

You may refuse by saying, "Thank you for inviting me, but I will not be able to come."

你可以这样拒绝：“谢谢你的邀请，但我来不了。”

youdao

"I refuse to leave this spot," answered the Cricket, "until I have told you a great truth."

“我不想离开这个地方，”蟋蟀回答说，“除非我告诉你一个大实话。”

youdao

If I ask you to help me, you can refuse and I will find others who will help me.

NPR: Robert Jordan, Hemingway's Bipartisan Hero