the water is boiling.为什么是主谓结构而不是主系表结构?

keep the water boiling为什么这里boiling要加ing I hear the sound of water boiling. The water is _________ (boil) now .boiling 和boiled 的区别 water is a liqiud,the boiling point __ __is 100degree centigrade the water is boiling.为什么是主谓结构而不是主系表结构? a chemistry problemwhy does the boiling point of methanoic acid is higher than water Finally,the water was boiling.(改为同义句） _____,the water was boiling. grammar,语法问题,请教分析一下此题目!You should be hurry. The ( ) water is cooling down.选项: a、boiling b、boiled c、being boiling d、having boiled The water in the kettle is boiling and wecan see steam coming out of it.怎么翻译. The water in the kettle is boiling and we can see steam coming out of it.怎么翻译 water boiling和boiling water的区别? she is near the boiling ,急 (a)水在烧.The water is boiling.(b)这是烧开的水.This is boiled water.b的语序为什么变化了 为什么不说 The water is boiled after the coffee absorbes water well ,add 40ml boiling water into the filter 翻译 选择 The water is（ ）in the kettle A.boil B.boiling C.to boil D. can boil要快,要准 水开了!用water这个词怎么说?The water's boiling!这句话对吗? What is the theoretical boiling point of water?Please anwswer this question before 21/11/09.I need it for my Science project.Thanks a lot! Don't drink water that is not boiling这句话哪里有错