The palace is being built.一个语法问题(The palace主语) （is being系） built表.请问这里的is being怎么不是谓语呢?既有助动词be 也有非谓语动词being是为什么呢

分析下面两个句子：The palace is considered to be being restore.The palace is considered to be being restore.The palace is considered to be restoring. The palace is being built.一个语法问题(The palace主语) （is being系） built表.请问这里的is being怎么不是谓语呢?既有助动词be 也有非谓语动词being是为什么呢 Where is the Summer Palace? ____fun place the Summer Palace is!感叹句 How old is the Palace Museum? 用英文的世界之最像:Potala Palace is the highest palace in the world. What is the highest palace in the world? What is the highest palace in the world? 英语翻译1.I had the chance to experience 3 different rooms during my stay at The Palace Hotel.Each time I complained I was moved,with the final move being to a room in the new wing.The Palace Hotel is a contrast of new and old.The lower old wing The Summer Palace is a very beautiful park.改为感叹句 This is the first time that I_the Summer Palace.(visit) What a beautiful park the Summer Palace is!(英译中） Lhasa is ( ) ( ) the Potala Palace.这个空怎么填? The Summer Palace is a place of i______ The Summer Palace is a very beautiful park.(改为感叹句) What is the Palace Museum also know as?啥意思? what is the famous palace in this country The Summer Palace is very（有名的）