动词后加-ing 的规则1.英语动词加-ing,通常是在原形词尾直接加 -ing 构成:cough—coughing,climb—climbing,stand—standing,fight—fighting2.以-e 结尾的动词(1)假如动词原形以一辅音加一不发音的—e 结尾,一般应去掉 e 再加 ing:write—writing , hope—hoping , care—caring,stare—staring , plane—planing , have—having,save—saving, produce-producing, breathe-breathing(2)以—ie 结尾的动词应先将 e 去掉,将 i 变成 y 然后再加-ing:die—dying,tie-tying,vie—vying,lie-lying(3)以—ee,-oe,-ye 结尾的动词加—ing 时应保留词尾 e:see—seeing,flee-fleeing,free-freeing,agree—agreeing,hoe-hoeing, dye—dyeing,eye—eyeing(4)以-ue 结尾的动词大多应先去 e 再加-ing:sue—suing,imbue—imbuing,construe—construing,pursue—pursuing,rue—ruing有时,词尾 e 可去掉也可保留:glue—gluing 或 glueing,cue—cuing 或 cueing, blue—blueing 或 bluing,true—truing 或 trueing,clue-clueing 或 cluing3.以一元音加一辅音结尾的动词(1)假如动词最后一音节为重读闭音节,最后一个字母需要重复:run—running, stop—stopping, hop—hopping, plan—