helpful

形容词 helpful:

1. providing assistance or serving a useful function
2. of service or assistance
3. showing a willingness to cooperate

1. You ale very helpful.
   您真帮了我的大忙。
2. The experience in army is helpful to him.
   他从军的经历对他很有用。
3. Maybe these nutrients are helpful to your health.
   或许这些营养品对你的健康有帮助。
4. These tactics are unlikely to be helpful to you.
   这种方法对你未必有用。
5. Lionel asked me how things were going at work, but I suspect he was just fishing for information that might be helpful to his own company.
   莱昂内尔问我工作情况如何，不过我怀疑他只是想探听一些可能对他自己公司有帮助的消息。
6. Knowing where a tool tip is at any time in a program can be very helpful.
   随时知道刀尖在程序中的位置是非常有益的。
7. I hired a car the day after landing and bought a comprehensive book of maps, which my found most helpful on the cross country.
   着陆后的当天，我租了一辆汽车并买了一本内容详细的地图册。我觉得在穿越村的旅途中，这本地图是很有帮助的。
8. It's often helpful during an illness to talk to other sufferers.
   病中与同病者谈天常是有益的。

help.ful

adj.（形容词）
Providing assistance; useful.
给予帮助的；有用的

【引伸】
help.fully
adv.（副词）
help.fulness
n.（名词）