1. Thanks a million!

萬分感謝！

2. I appreciate it indeed!

我真的很感激！

3. I don’t know what to say.

真不知道說什么才好了。

4. It's very nice of you.

你真是太好了。

5. What would I do without you?

要不是你，真不知道該怎么辦。

6. Thanks for the help. I owe you one.

多謝幫忙。我欠你個(gè)人情。

7. I'm truly grateful for your help.

我非常感激你的幫助。

8. You have my gratitude.

十分感謝。

9. I cannot express to you how grateful I am.

我無法向你表達(dá)我是多么感激。

10. I can't thank you enough.

不勝感激。