vt., vi.1. （与on, off连用）开关（电器等设备）to switch the TV on开电视
to switch the radio off关收音机
2. 改变，变化；交换He switched the conversation from one subject to another.他转变话题。
I used to cook on electricity, but I've switched to gas.我过去用电烧饭，但现已换成用煤气了。
3. （与over连用）彻底改变，互换位置4. 抽打；鞭打；急抽；甩动He switched it out of my hand.他突然从我手中把它抢走。