高三册第17-18单元疑难点解析
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作者：李林
1. Struggling in a world of silence and darkness, I must have appeared to them to be simple. 我挣扎在一个听不到声音、看不见天日的世界里,对他们来说,我准显得头脑简单。
1) world表示"世界"时,通常在其前加定冠词the;但world前面或后面有定语修饰时,通常要用不定冠词a。
[原题再现]
Wouldn't it be ________ wonderful world if all nations lived in ________ peace with one another?
A. a; / B. the; / C. a; the D. the; the
答案:A
2) must have appeared表示对过去的一种肯定推测,意思是"肯定","准是"。例如:
It must have rained last night, for the ground is wet.昨天晚上肯定下过雨了,因为地面还是湿的。
对过去的否定推测不能用"mustn't + have + 过去分词",而应使用"can't (couldn't) + have + 过去分词"。
[原题再现]
My sister met him at the Grand Theatre yesterday afternoon, so he ________ your lecture.
A. couldn't have attended
B. needn't have attended
C. mustn't have attended
D. shouldn't have attended
答案:A
2. Those first words were to change my world.我最先学的这些单词改变了我的生活天地。
"be + 不定式"结构常有以下用法:
1) 常用来表示计划或安排(做某事)的意思。例如:
We are to begin the work next month.我们安排下个月开始这项工作。
2) 表示注定要发生的事。例如:
This experience was to change his life.这次经历注定要改变他的生活。
[原题再现]
If a man ________ succeed, he must work as hard as he can.
A. will B. is to
C. is going to D. should
答案:B
3. When there is no one in the office, you can leave the answering machine on so that people who call you up can leave a message.办公室没有人的时候,你可以让留言机开着,以便给你打电话的人可以留言。
本句中两次出现了leave,第一个leave后接复合宾语,是"使......处于(某种状态)"的意思;第二个leave是"把......交给;委托"的意思,短语leave sb. sth (=leave sth. to sb.)意思是"把某物(事)交给某人"。leave a message的意思是"留言"。
[原题再现]
①________ it with me and I'll see what I can do.
A. When left B. Leaving
C. If you leave D. Leave
② I'm afraid Mr. Brown isn't in. Would you like to ________ a message?
A. give B. leave C. carry D. take
答案:① D ② B
4. It took him some time to connect the long rubber pipe to the air supply pipe that ran round the port, but at last it was done and as a result work was able to progress much faster.他花了相当长的时间去把那根长长的橡皮管接到环绕港口的输气管上,但最后还是接好了,因此,修理工作进展得快多了。be able to一般可与can互换使用,其区别是:
1) can没有将来时、完成时等,这种情况下用be able to表达。
2) 表示"过去成功地做了某事"时,不可用could,应使用was (were) able to来表达。本句中的was able to就不能用could替换。
[原题再现]
The fire spread through the hotel very quickly but everyone ________ get out.
A. had to B. would
C. could D. was able to
答案:D


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