非常感谢

• extremely grateful
• very thankful

例句

1. 我非常感谢你的帮助。
   I'm very grateful to you for your help.
2. 真是非常感谢你了。
   Thank you very much indeed.
3. 我将非常感谢您的帮助。
   I'd be most grateful for your help.
4. 我非常感谢您。
   I'm extremely grateful to you.