谢谢姐夫用英文怎么说

"谢谢姐夫"用英语可以说作 "Thank you, brother-in-law".

"Brother-in-law" 是英语中对于"姐夫"这个词的翻译。"Brother" 意思是兄弟，而"in-law" 意思是婚姻关系中的亲戚。所以 "brother-in-law" 意思是婚姻关系中的兄弟。

例句：

"Thank you, brother-in-law, for lending me your car." (谢谢姐夫借我你的车。)
"I really appreciate your help, brother-in-law." (我真的很感谢姐夫的帮助。)
"I'm so lucky to have a great brother-in-law pke you." (我真幸运有像你这样的姐夫。)