新概念第二册的第29课,有一句话,The "taxi" is a small Swiss aeroplane called a "Pilatus Porter".这句话,前面为什么用一般现在时,后面又called又变成一般过去时了呢?

新概念第二册的第29课,有一句话,The taxi is a small Swiss aeroplane called a Pilatus Porter.这句话,前面为什么用一般现在时,后面又called又变成一般过去时了呢? 新概念英语第二册第54课的一句话时态问题在新概念英语第二册第54课的一句话如下：I picked up the receiver between two sticky fingers and was dismayed when I recognized the voice of Helen Bates.在这句话中“when I r 新概念英语第二册第61课的语法重点 新概念英语第二册第20课的摘要写作 新概念英语第二册第25课的摘要写作 新概念英语第二册 summary writing70第70课的 新概念英语第二册 summary writing71第71课的 新概念英语第二册 summary writing72第72课的 新概念第二册第38课课文 新概念第二册第22课语法 新概念第二册第28课中文翻译 Though people have often laughed at stories told by seamen这名是新概念英语第二册第82课的一句话,如何翻译? 新概念第二册第1~ 请教《新概念英语》（4）上的一句话《新概念》第四册第二课第十二行it is impossible to make more than the wildest guess...译文给的是：我们简直无法猜测...,请问为什么这样翻?那位能 新概念三册一句话的理解 第46课 The worst thing about the do it新概念三册一句话的理解第46课The worst thing about the do it yourself game is that sometimes even men live under the delusion that they can do anything,even when th 谁有新概念英语第二册第1课到第24课课文的缩写缩写前24课, 新概念英语第二册 summary writing 73第72课的第73课的 新概念英语第二册的第77课中的一句话The operation,which lasted for over four hours,proved to be very difficult because of the hard resin which covered the skin.proved to be very difficult,to在这里是作什么用,另外be加形容词