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】
本题要求根据句意给所给单词添加正确的否定前缀,解题思路为:①先通读每个句子,明确空格处需表达所给单词的相反含义;②回忆英语中常见的否定前缀(如im-、un-、in-等),不同形容词搭配不同的否定前缀;③结合句意和单词的固定前缀搭配,确定正确的否定形式。
【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-,故加前缀后为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-,故加前缀后为unsure。
3. 句意:如果有人对别人不礼貌,那他是不礼貌的。polite的否定前缀为im-,故加前缀后为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-,故加前缀后为unfriendly。
5. 句意:别信他,他说的是不正确的。correct的否定前缀为in-,故加前缀后为incorrect。
6. 句意:六月下雪是不寻常的,通常很热。usual的否定前缀为un-,故加前缀后为unusual。
7. 句意:炸鸡尝起来美味但不健康。healthy的否定前缀为un-,故加前缀后为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-,故加前缀后为incomplete。
【答案】
1. impossible
2. unsure
3. impolite
4. unfriendly
5. incorrect
6. unusual
7. unhealthy
8. incomplete
【知识点】
英语否定前缀用法;形容词的否定形式
【点评】
本题考查常见形容词的否定前缀搭配,需结合句意判断否定含义,掌握基础的否定前缀规则即可解答,属于英语基础题型。
【难度系数】
0.7