2017高考英语二轮复习：set短语用法

　　2013高考英语二轮复习：set短语用法

　　set off (for)出发，动身(去某地)

　　set off 引爆

　　set out to do sth.着手……

　　set about+ doing开始(着手)做……

　　①We’ll set off fox Xi’an at six tomorrow.

　　②Polonium is used to set off a nuclear bomb.

　　③He set out to break the record for the crosschannel swim.④I don’t know how to set about this job.