"Helpful"是英语中表示"愿意帮忙"的形容词。它来自英语单词"help"和后缀"-ful"。"Help"表示"帮助"，而"-ful"表示"有…的"。因此"helpful"的意思就是"有帮助的"。
例句:
She is always helpful and wilpng to lend a hand.
她总是乐于助人。
That was a helpful tip, thank you!
那是一条有用的提示，谢谢！
The customer service representative was very helpful in resolving my problem.
那位客服代表非常乐于帮助我解决问题。