Ⅰ. thanks for = thank you for “为……谢”强调谢的原因。如：
① Thanks for lending me your umbrella.谢谢你借给我雨伞。
② Thank you for your dictionary. 谢谢你的字典。
Ⅱ. thanks to “多亏了……”;“由于……的帮助”相当于because of …或 with the help of … , 在此短语中，to是一个介词，后接名词或代词。如：
① Thanks to the doctor, I am well again. 多亏这位医生，我身体又康复了。
② Thanks to our teachers, we all passed the exam. 多亏了老师的帮助，我们都及格了。
③ Thanks to your help, I finish the work on time. 多亏了你的帮助，我才能按时完成工作。