I am very sincerely (most) (truly) grateful to you for ... 为了……，我非常真挚的（深深的）（真诚的）感谢您。
I can never thank you enough for you generosity.我对您的慷慨大度永远感激不尽。
I can never thank you enough.我对您永远感激不尽。
I cannot tell you how much your letter delighted(relieved)(amused)(enchanted)me. 我无法告诉您，您的来信使我多么高兴（宽慰）（觉得有趣）（陶醉）。
I do appreciate your timely help.我的确很感激您的及时帮助。问候短信.
www.qidian55.com
I really can’t thank you enough for the invitation.我对您的邀请真是感激不尽。
I really can’t thank you enough.我对您真是感激不尽。
I really don’t know how a can thank you enough.我真不知怎样感谢你才好。
I should like to express my appreciation.我谨表示我的谢意。
I should like to express my gratitude for your kidness.我向您对我的好意表示感谢。问候短信.
www.qidian55.com
I should like to say how grateful i am for his invitation.他向我提供了消息，我表示深切的感谢。
I should like to say how grateful i am.我谨表示我深切的谢意。
I sincerely (deeply) (warmly) appreciate ... 我真挚的（深深的）（热情的）感谢......
I’m extremely grateful to you.我非常感谢你。
I’m much obliged to you.我非常感谢你。
I’m really very grateful to you for your advice.我真的非常感谢你的劝告。.
www.qidian55.com
I’m really very grateful to you.我真的非常感谢你。
Please accept ( I wish to express )my sincere (grateful) (profound) appreciation for ... 请接受（致以）真挚的（衷心的）（深切的）感谢。
Thank you for providing the requested information.如果你询问某人一些信息，他们花了点时间才发送给你，那就用这句句子表示你仍然对他们的付出表示感激。
Thanks very much for you invitation.非常感谢你的邀请。
There is nothing more important (satisfying) (gratifying) to me than to receive one of your letters. 再也没有比收到您的来信更使我觉得重要（快慰）（感激）了。
Your letters are so much fun (comfort) (entertainment) (company). 您的来信充满了乐趣（给了很大安慰）（带来了欢乐）（使我不感寂寞）。
Your most courteous (considerate)(delightful)letter. 您那彬彬有礼（体贴入微）（令人欣慰）的来信
问候短信.