helpful adj.
VERBS be, prove | consider sth, find sb/sth
ADV. enormously, especially, extremely, immensely, most, particularly, really, unusually, very Thank you, you have been most helpful. | not at all, not particularly Demanding peace short of victory would not be at all helpful. | fairly, quite | immediately indulging in ambitious, but not immediately helpful plans | generally, usually | always, invariably
PREP. for This information would be extremely helpful for teenagers. | in Graphs are helpful in presenting the information. | on He was quite helpful on how to do the accounts. | to The lifts will be helpful to the older patients.
PHRASES friendly and helpful I found all the staff friendly and helpful.
You can also check other dicts: helpful (English, 中文解释 ), wordnet sense, Collins Definition