a2581810110
gratefula.1. 感谢的,感激的[F][(+for/to)][+to-v][+(that)]I am grateful to have you help me repair the house.承你帮忙修缮房子,我十分感激。She was grateful to George for all that he had done.她感激乔治所做的一切。2. 表示感谢的[B]They sent us a grateful letter.他们给我们寄来了一封感谢信。3. 令人愉快的;可喜的thankfula.1. 感谢的,感激的;欣慰的[(+for)][+to-v][+that]I was thankful for her help.我感谢她的帮助。*在用法上thankful后不可以接to， 而grateful可以。当thankful后接to时， to后必须接另一动词 。其他没什么区别了。回LX， thankful后边可以接to啊，我没说不可以。 但是你用错了，只能说be grateful to sb.sth./be thankful for sb.sth.
老马4568
grateful: a. 感激的,感谢的例句与用法: 1. Your kindness is grateful. 你的友善令人感激。 2. He was grateful for all you did. 他对你所做的一切表示感激。 thankful: a. 感谢的例句与用法: 1. I'm thankful to know that he is safe. 得知他很安全，我感到欣慰。 2. We were thankful for his help. 我们感谢他的帮助。be grateful for sth 和 be thankful for 是一样的be thankful to 后面要加动词原形.
啵嘶小王子
形容词 relieved e.g. He was a relieved man动词 relieve e.g. He is relieved on hearing the news
