grateful /ɡreiffəl/ adj. 感激的，感谢的：I am most (deeply) grateful to you. 我太感激你了（对你表示深深的谢意）。They sent us a grateful letter.他们给我们寄来了一封感谢信。I'd be very grateful if you could let me know as soon as possible.如果你尽快让我知道我将非常感激。I’m really grateful for your help.对你的帮助我真的感激不尽。