PHRASAL VERB [usually passive]说服…帮忙 If you say that you were roped in to do a particular task, you mean that someone persuaded you to help them do that task. 说服…帮忙 [mainly British, informal]
Visitors were roped in for potato picking and harvesting. [beV-ed P + for]
参观者们被说动来帮忙挖土豆和收土豆。
I got roped in to help with the timekeeping. [getV-ed P to-inf]