在很多英語單詞的詞根前加上前綴 “prefixes”，則能使之變?yōu)榫哂腥乱馑嫉男略~。常見的英語前綴有 “in-、un-、de-、dis-” 等。比如，在單詞 “certain 確定的” 前面加上前綴 “un-”，組成形容詞 “uncertain”，詞義也隨之變成了 “不確定的”。英語中還有哪些常用前綴？它們的用法分別是什么？考一考自己對(duì)前綴的理解，做下面的八道測驗(yàn)題。

1. When she was younger, she was very _______ responsible.

a) il-

b) ir-

c) im-

d) de-

2. Yu Yan has travelled the world on her own. She’s highly _______ dependent.

a) il-

b) im-

c) un-

d) in-

3. In countries all over the world, it is _______ legal to buy alcohol under the age of 18.

a) il-

b) un-

c) dis-

d) de-

4. Mika’s boss is so _______ patient. He wants everything done immediately.

a) in-

b) il-

c) im-

d) dis-

5. Eating my cheese without asking is so _______ honest.

a) un-

b) dis-

c) de-

d) in-

6. She’s so clever. That card trick she did was _______ believable!

a) un-

b) dis-

c) im-

d) in-

7. When will this situation ever end? The discussions can’t continue _______ definitely.

a) un-

b) dis-

c) im-

d) in-

8. Will scientists ever _______ code the human genome?

a) dis-

b) un-

c) de-

d) in-

答案

1) b, 2) d, 3) a, 4) c, 5) b, 6) a, 7) d, 8) c.