☞invertv. [ɪn′vɜːt]　(inverts; inverted; inverting)
　He inverted the glass and the water ran out.　他将杯子倒转，水流了出来。
If you invert "I can", you have "can I".如果你把I can两词前后颠倒一下，就成了can I.
　She caught the insect by inverting her cup over it.　她用杯子扣住了那只昆虫。