动词ing,直接加ing,去e加ing,双写尾字母再加ing,各5个。答:have,having;file,filing;bite,biting;cave,caving;dive,diving;take,taking;debate,debating;accumulate,accumulating;双写尾字母再加ing cut -- cutting 切 put-- putting 放 swim -- swimming 游泳 begin -- beginning 开始 get -- getting 得到,获得 forget -- forgetting 忘记 hit -- ...