helpfuladj.有用的；有益的；有帮助的；愿意帮忙的；
helpfullyadv.有益地；有用地
The people I spoke to were very helpful.
我交谈过的.人都很肯帮忙。
The booklet should be very helpful to parents of disabled children.
这本小册子对于残疾儿童的父母会很有用。
Role-play is helpful in developing communication skills.
角色扮演有助于提高沟通技巧。
