动词ing形式的变化规则:(1) 一般情况下,直接在动词后加ing work - working sleep - sleeping study - studying (2) 动词以不发音的e结尾,要去e加ing take - taking make - making dance - dancing (3) 重读闭音节的动词,要双写词尾字母,再加ing cut - cutting put - putting begin - beginning (4) 以ie结尾的动词,把变成y再加ing lie - lying tie - tying die - dying