高中英语单词记忆表 第33期

double  adj. 加倍的，双的   v. 加倍，增倍
[特征]
a double bed 一张双人床
- His debt is double what it was five years ago.
他的债务是五年前的两倍。
- The money will double next year.
这些钱明年将翻一番。
[练习与解答]
- The price of vegetables has                 because of bad weather.
A. doubt   B. doubted   C. troubled   D. doubled
答案：D
（因为糟糕的天气，蔬菜的价格翻了一倍。double意为“增加一倍，翻一番”；doubt意为“怀疑，不相信”；trouble意为“麻烦，打扰”。）

doubt  n. 怀疑，疑惑  vt. 怀疑，不信
[特征]
- I have no doubt that he'll pass the exam.
我不怀疑他会通过考试。
- I doubt that he is telling a lie.
我不相信他在说谎。
[贴心叮咛]
doubt非常重要。它既可作名词也可作动词，它的用法值得我们注意。
[备考必备]
①动词doubt后常接名词从句。在肯定句中，名词从句由whether，if，when，what等来引导；而在疑问句及否定句中，用that来引导。
- It has been doubted whether the story is true.
有人怀疑这个故事是否属实。
- I don't doubt that he will keep his promise.
我不怀疑这个故事是否属实。
②doubt作名词时，可以说There is no doubt that ...，但不能用It is no doubt that ...
（误）It is no doubt that he is a rich man.
（正）There is no doubt that he is a rich man.
毫无疑问他是个有钱人。
③重要词组
be in doubt about sth. 对某事不能确定
have doubts about (doing) sth. 怀疑（做）某事
no doubt 无疑地，很可能
- No doubt he is a hand some man.
毫无疑问他是个英俊的男人。

download  v. 下载
[特征]
- Many movies can be downloaded from Internet.
很多电影都可以从互联网上下载。
[贴心叮咛]
这个词是伴随着互联网的发展而流行起来的，相信大家一定非常了解download这个词。

downstairs  adv. 在楼下；往楼下
[特征]
fall downstairs 跌下楼
- Mother went downstairs to answer the front door.
妈妈下楼去开前门。
（downstairs是副词，而不是名词，其前面不加介词。）
- I went downstairs to have breakfast.
我下楼吃早饭。