语法改错练习
1.No one thought that Harry’s suggestion was worth to consider.
2.There to be no homework left,the pupils could do whatever they like.
选做★：To be given such a good chance, he planned to learn more.
答案解析：
1.【解析】应将to consider 改为considering。该题考察固定结构中的动名词表达。Be worth相当于be worthy of，其后只能接动名词而不能用其它形式。
2.【解析】应将there to be 改为there being。该题考察分词作状语的独立结构。No homework left应为一个非谓语的表达，作后面句子的附属成分，所以要用there being形式。
选做：【解析】应将to be given改为having been given。该题考察分词短语作原因状语的用法。He是give chance的承受者，所以要用被动态be given,又因be given chance在he plan之前，所以要用完成式。
译汉→英
挑战难句：
1.Just as the value of a telephone network increase with each new phone added to the system,so does the value of a computer system increase with each program that turns out.
2.This makes it easier to dismiss all scientific pronouncements, but especially those made by the scientists who present themselves as”experts”.(05.12阅读)
3.A body at rest will remain at rest and a body in motion remains in motion at a constant speed in a straight line,unless acted upon by an external force.
译汉→英
1.__________(既然我的头脑已经清醒了)，my brain was also beginning to work much better.
2.Reading is to mind__________(犹如食物对人体的作用)
3.Better take more clothes__________(万一天气变冷)
答案解析：
挑战难句：
1.【解析】该题考察with+名词+分词,这一独立分词结构的用法。这里的逻辑主语是each new phone,与动词add构成被动关系。
【句意】如果电话系统的价值是随着每一部新加到这个系统的电话而增长，同样，计算机系统的价值随着它所运行的每个程序而增加。
2.【解析】该题考察it作形式宾语的用法，it是形式宾语，真正的宾语是不定式短语to dismiss all scientific pronouncements.过去分词made作后置定语，修饰those。Who 引导定语从句，修饰scientists.
【句意】这样就更容易不理会所有的科学声明了，尤其是那些宣称自己是“专家”的科学家所作的声明。
3.【妙译】除非受到外力作用，静止的物体将继续保持静止，运动的物体将继续做匀速直线运动。
【点拨】本句是一个复合句。At rest和in motion是两个介词短语，分别作body的定语，意思分别是“处于静止状态中”和“处于运动状态中”。连词unless引导条件状语从句，unless后面省略了it is。
译汉→英
1.Now that my head had cleared
【解析】该题考察now that引导原因状语从句的用法，其意思为“既然”
2.what food is to the body
【解析】该题考点为“A is to B as/what C is to D”句型，作为一种方式状语从句使用。
3.in case the weather is cold
【解析】该题考查in case 的意义以及引导目的状语从句的用法，其含义为“以防，万一”