形容詞 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.
   您真幫了我的大忙。
2. The experience in army is helpful to him.
   他從軍的經歷對他很有用。
3. Maybe these nutrients are helpful to your health.
   或許這些營養(yǎng)品對你的健康有幫助。
4. These tactics are unlikely to be helpful to you.
   這種方法對你未必有用。
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.
   萊昂內爾問我工作情況如何，不過我懷疑他只是想探聽一些可能對他自己公司有幫助的消息。
6. Knowing where a tool tip is at any time in a program can be very helpful.
   隨時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.
   著陸后的當天，我租了一輛汽車并買了一本內容詳細的地圖冊。我覺得在穿越村的旅途中，這本地圖是很有幫助的。
8. It's often helpful during an illness to talk to other sufferers.
   病中與同病者談天常是有益的。

help.ful

adj.（形容詞）
Providing assistance; useful.
給予幫助的；有用的

【引伸】
help.fully
adv.（副詞）
help.fulness
n.（名詞）