If you describe someone as helpful, you mean that they help you in some way, such as doing part of your job for you or by giving you advice or information.
例句
The staff in the London office are helpful but only have limited information...倫敦辦事處的工作人員給予了幫助，但他們掌握的信息有限。James is a very helpful and cooperative lad...詹姆斯是個肯幫忙、好合作的小伙子。
ADJ-GRADED
（信息、建議等）有幫助的，有用的
If you describe information or advice as helpful, you mean that it is useful for you.
例句
The catalog includes helpful information on the different bike models available...目錄中包括了在售的各種型號自行車的有用信息。The following information may be helpful to readers.下列信息可能對讀者有用。
ADJ-GRADED
(事物）有助于改善局面的，有好處的
Something that is helpful makes a situation more pleasant or more easy to tolerate.
例句
A predominantly liquid diet for a day or two may be helpful...一兩天里主要吃流質食物可能會有好處。It is often helpful to have your spouse in the room when major news is expected...等待重大消息時最好有配偶在場。