helpful的副词形式
helpfully adv. 有益地；有用地；
例句
He gave his name and then helpfully spelled it.
She helpfully suggested that I try the local library.
她很热心地建议我试试本地的图书馆。
They had helpfully provided us with instructions on how to find the house.
他们已经热心地给我们提供了如何找到那所房子的.说明。
The staff will helpfully attend to your needs.
工作人员会帮忙关照你的需要。
\'Let me explain!\' he added helpfully.
“让我来说明一下！”他热心地补充道。