词性的转换答:动词变名词v+er/or,表示从事某种职业的人sing-singer,teach-teacher。write-writer,run-runner,play-player,read-reader,speak-speaker,dance-dancer,drive-driver,listen-listener,work-worker.own-owner.think-thinker.entertain-entertainer,pray-prayer.perform-performer.win-winner.report-reporter design-...