お役に立てる
to put anything in requisition―call anything into requisition―(ご用立ての意味なら)―place anything at one's service―place anything at one's disposal
to put something to some use
to be useful―of use―serviceable―of service―good for something―to come in useful―serve one's purpose―prove of service―render service―stand one in stead
役に立つさま
お手伝いしますよ。
I entreat your help.
I request your assistance
I will lend you my assistance―lend you what assistance I can.
Would you like us to help (you)?
I don't suppose you could lend me a hand?
You deserve well of the public.
おススメ
Sit properly.