keep the water boiling为什么这里boiling要加ing

keep the water boiling为什么这里boiling要加ing water boiling和boiling water的区别? I hear the sound of water boiling. Put some tea into the boiling water and keep it remain for a the water is boiling.为什么是主谓结构而不是主系表结构? What is the theoretical boiling point of water? Finally,the water was boiling.(改为同义句） _____,the water was bo 为什么是boiling water而不是boiled water,被煮沸的水,不是很通吗 水开了!用water这个词怎么说?The water's boiling!这句话对吗? after the coffee absorbes water well ,add 40ml boiling water 英语翻译Blanch the pork in a pot of boiling water.Throw out the 英语翻译1.The water is boiling.Can you turn off the gas?2.It isn