thankyou。
简介
thank you 的音译形式，在 中国内地使用，非正式场合使用此书写 形式，正式及其他书面材料不适合书写成该形式。
原型为：thank you 表示 谢谢的意思
2
用法

3Q
See also: thanks used to show that you are grateful to somebody for something they have done （表示感激） 谢谢你 ~ (for sth/for doing sth)
Thank you for your letter. 谢谢你的来信。
Thank you very much for sending the photos. 非常 感谢你寄给我这些照片。
a polite way of accepting something that somebody has offered you （接受好意）好， 谢谢你
‘Would you like some help with that?’ ‘Oh, thank you.’ “这事你需要帮忙吗？”“需要， 谢谢你。”
a polite way of refusing something that somebody has offered you （婉言谢绝）不用了， 谢谢你
‘Would you like some more cake?’ ‘No thank you.’ “你再来点儿蛋糕吗？”“不要了， 谢谢你。