thankful to和thankful for的区别：be thankful to后面加人，表示感谢某人thankful for后面加事，表示对某事表示感谢。

thankful to的例句：I was thankful to see they'd all arrived safely（看到他们都平安到达，我感到欣慰）；thankful for的例句：I was so thankful for his support（我对他的支持非常感激）。