二、根据句意,在所给词的前面加上正确的前缀
1. It's
impossible
(possible) for us to finish the work within hours.
2. He stopped walking at the crossing,
unsure
(sure) about which road to choose.
3. If someone doesn't show good manners (举止) to others, he is
impolite
(polite).
4. The shopkeeper gave me an
unfriendly
(friendly) look when I wanted to try on a third pair of jeans.
5. Don't believe him. What he told you is
incorrect
(correct).
6. It's
unusual
(usual) to see snow in June. It's usually hot.
7. — Would you like to eat some fried chicken?
— No, thanks. I think it tastes delicious but is
unhealthy
(healthy).
8. My homework is
incomplete
(complete) because I forgot to do the last two Maths problems.
解析:
【分析】本题要求在所给形容词前添加正确的否定前缀,需掌握常见否定前缀(如im-、un-、in-等)与形容词的搭配规则,结合句意判断所需的否定含义,进而选择合适的前缀构成正确的形容词。
【解析】1. 句意:我们几小时内完成这项工作是不可能的。possible的否定前缀为im-,故填impossible;2. 句意:他在十字路口停下,不确定选哪条路。sure的否定前缀为un-,故填unsure;3. 句意:如果有人对他人举止不好,他是不礼貌的。polite的否定前缀为im-,故填impolite;4. 句意:当我想试第三条牛仔裤时,店主给了我不友好的表情。friendly的否定前缀为un-,故填unfriendly;5. 句意:别信他,他告诉你的是不正确的。correct的否定前缀为in-,故填incorrect;6. 句意:六月下雪是不寻常的,通常六月很热。usual的否定前缀为un-,故填unusual;7. 句意:——你想吃炸鸡吗?——不了,谢谢。它尝起来美味但不健康。healthy的否定前缀为un-,故填unhealthy;8. 句意:我的作业没完成,因为我忘了做最后两道数学题。complete的否定前缀为in-,故填incomplete。
【答案】1. impossible 2. unsure 3. impolite 4. unfriendly 5. incorrect 6. unusual 7. unhealthy 8. incomplete
【知识点】形容词的否定前缀
【点评】本题考查常见否定前缀的用法,需积累不同形容词对应的否定前缀,结合句意判断否定含义即可解答,属于基础题型。
【难度系数】0.6