A huge flying reptile that died out with the dinosaurs some 65 million years ago, the QUET had a wingspan of 36 feet, (belived to be) the largeat flying creature the world has ever seen.
正确答案:and it is believed to have been
为什么是这样?作者: lucylu 时间: 2002-12-24 22:43
1.本句主语是the QUET，前面是他的同位语，谓语是had,所以and it is believed to have been是完全正确的。
2.and it is believed to have been中的it is 是不能省略的。
3.句中用了the world has ever seen，所以believed to的结构用了完成式。
原则上来讲好像是这样子吧！但最主要是不引起歧义，本句用belived to be的话，它在逻辑上修饰the QUET，但是从它的位置上来看，它修饰wingspan，用it is believed...与前面并列，消除了这种歧义，直接修饰the QUET，当然从时态的角度讲，it is believed...表达更准确作者: tanggu 时间: 2002-12-26 21:54
