1.要2.不是3.是4.是.因为情态动词也可作为实义动词5.There is a boy playing pingpang6.What does Sandy want to do?7.谓语动词是与非谓语动词相对应的概念.两者都是动词,但是前者是作谓语成分,后者不能作谓语成分.而谓语成分就是用来说明主语的动作或状态的,一般由动词或短语动词承担. 比如:我看电视.”看”就是谓语. 你正在上网.”上网”也是谓语. 再举几个英语句子吧:I see a girl.我看见一个女孩.”看见””see"就是这个句子的谓语.而see也是个动词,所以就叫做谓语动词.She is very beautiful.她很...