mask dismask

burden disburden

il--加在以i开头的形容词之前

legal illegal logical illogical

literate illiterate

im--加在以b,m,p开头的形容词之前

possible impossible

mortal immortal

moral immoral

balanced imbalanced

ir-加在以r开头的形容词之前

regular irregular rational irrational

resistible irresistlble

in--主要用于其它字母开头的词之前

human inhuman correct incorrect

justice injustice sincere insincere

un--只能用于形容词和动词之前

不

happy unhappy friendly unfriendly

lucky unlucky

无

conditional unconditional limited unlimited

非

official unofficial just unjust

未，主要用于过去分词之前

undecided unfinished unexpected unhurt

用于动词之前表示做相反的动作

lock unlock tie untie

cover uncover pack unpack

dress undress load unload新概念英语官方网

Exercise

1.polite impolite 2.agree disagree

3.legible illegible 4.accurate inaccurate

5.locked unlocked 6.regular irregular

【Mutiple choice questions】

1.B正确on one's way to do

He is on the way to become a lawyer.

2.A正确warn somebody out of one's way in one's way

3.C正确

4.名词具有修饰词的时候，语序的排列顺序通常是形容词、名词

an old village school

C正确

5.B正确做句子结构题时要和原文加以对比

6.made of A正确

7.began doing something/began to do something

A正确

8.D正确

9.accelerated: 加速A正确

speed: 加快动作和工作的进程speed up

We'd better speed up,if we want to get there in time.

The driver accelerated to pass the other car.

The car sped along the road.

reversed: 倒车

The car reversed through the gate.

10.Two others 和their faces同位语关系

A正确

overdressed I fell rather overdressed in this smart suit.

overlooked: 俯瞰

11.for the time being--temporarily

B正确meanwhile--at the same time

As it happened--这类事情的发生for a while --for a moment

12.flown--fly 不能用于被动语态go flying send something flying

A gust of wind sent the paper flying in all directions

hurled: 用力的去投掷

C正确

projected: send up