thank for 与thank to

I should give thanks to you for your help.
to 接对象for接原因

thank..for ... 为某事感谢某人
Thank you for helping me.
thanks to 由于
Thanks to him, I passed the exam.

thank for指感谢某人做某事 例:I thank you for your help.
没有thank to这词组，应是thanks to 意味多亏了... 例:Thanks to my carefulness, I finished my work without any mistake.