set a trap for [sb]v exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."
(ensnare, trick)
为某人设下陷阱 wèi mǒu rén shè xià xiàn jǐng
给某人下套 gěi mǒu rén xià tào
We set a trap for him to see if we were right about him stealing from the till.