"It is called a clavichord",这句话为什么用了“a”?call做被动态时是“被称作.”,应该直接跟名词的吧?

What is it called? Do you know ___?---PSP A.how it is called B.what it is called 英语翻译Canone all'Unisono.a 1 Clava 1 ovvero 2 Clav.Canone alla Seconda.a 1 Clav.a 1 ovvero 2 Clav.Al tempo di Giga Canone alla Terza.a 1 Clav.Fughetta.a 1 Clav.Canone alla Quarta.(a 1 Clav.) Canone alla Quinta.a 1 Clav.Andante Ouverture.a 1 Cla It is called a clavichord.为什么要加个“a”, I have a dog ,it( )BOBA calls B,is called , 懂英语请进It is called a clavichord. 英语 问题it is called后面什么时候加A什么时候不加呢,举例it is called a pilatus porter It called和It is called有什么区别 It is called a clavichord.中的called是过去式吗?如果是,那为什么还用is而不是was呢? It looks like a cat,it is called a great hunter这是什么动物 英语单项选择一题It is a comedy ____________ Happiness.It is a comedy ____________ Happiness.A.call B.called C.was named D.was called ——Well,where did you spend your holiday last summer?——At______.A.where it is called Grand HotelB.which is called Grand HotelC.what is called Grand HotelD.that is called Grand Hotel 13.–Well,where did you spend your night that day?--At ______.A.where it is called Grand Hotel B.what is called Grand HotelC.which is called Grand Hotel D.that is called Grand Hotel为什么 Well,where did you spend your night that day?At________Grand Hotel.A.where is called B.what is called C.which is called D.where it is called请翻译并说明理由 this is a very famous film award.what is it called VENUS IS CALLED THE EVENING AND MORNING STAR BUT it is not a star :when 3 people have sex it is called a THREESOME when 2 people have sex it is called a TWOSOME Now it is called a clavichord.为什么要有冠词“a”?belong with 有没这种用法 一首歌有诶