helpful的副词形式是什么
helpfully adv. 有益地；有用地；
例句
She helpfully suggested that I try the local library.
So usually the old person tries helpfully to answer the question by offering advice.
所以老人们常常是根据别人的建议尝试去回答这些问题并使回答更有帮助。
The teachers here are kind and helpfully. They are not only our teachers but also our friends.
这里的老师都是有益的。他们不仅是我们的老师而且还是我们的朋友。
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。