为什么是boiling water而不是boiled water,被煮沸的水,不是很通吗

为什么是boiling water而不是boiled water,被煮沸的水,不是很通吗 the water is boiling.为什么是主谓结构而不是主系表结构? water boiling和boiling water的区别? keep the water boiling为什么这里boiling要加ing boiled water boiling water hot water三者区别? I hear the sound of water boiling. 什么是tipping point,boiling point? Finally,the water was boiling.(改为同义句） _____,the water was boiling. the earth is our home.we must ___the land,air,and water clean.为什么是keep而不是get Ice turns into water when the temperature is ____ (超过) 0℃为什么是above而不是over water the tree ofen ,of it will die =_If__ you don't water the young tree often ,it wil be _dead_为什么是''be dead '' ,而不是died? 1. ______ is one of the water sports. 为什么选BA. Water-ski B. Water-skiing C. Water-sking D. Watering-skiing为什么是B而不是其他,他们分别用在什么形式的句子中? He was boiling water over an open fire yesterday.翻译 when he was boiling drinking water over an open 为什么是opening而不是openning? 为什么是一氧化碳而不是氧化碳 为什么是指南针而不是指北针? 为什么是抗体,而不是抗原