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词根词缀学英语单词是很好的方法，下面是小初英语单词构词法前缀后缀词汇一览表。

前缀

un- “不”

happy → unhappy

like → unlike

usual → unusual

friendly → unfriendly

im-“不”　　　　

possible → impossible

　　后缀

-er“人”

teach → teacher

play → player

clean → cleaner

drive → driver

(以e结尾，-r)

run → runner

(重读闭音节，双写-er)

win → winner

travel → traveller

-or“人” 　 　　　

invent → inventor

visit → visitor

-ly(副词后缀) 　

bad → badly / quick → quickly

careful → carefully / happy → happily

deep → deeply / lucky → luckily

usual → usually / noisy → noisily

slow → slowly / angry → angrily

strong → strongly / quiet → quietly

特例：

true → truly

terrible → terribly

possible → possibly

-ful(形容词后缀)

care → careful

help → helpful

use → useful

forget → forgetful

-y (形容词后缀)

rain → rainy

luck → lucky

cloud → cloudy

noise → noisy

(以e结尾，去e，加-y)

snow → snowy

sun → sunny

(双写，加-y)

wind → windy

-ion(名词后缀)

invent → invention

operate → operation

-ness(名词后缀)

busy → business

good → goodness

一些特例：

动词——形容词

sleep → asleep

die → dead

enjoy → enjoyable

动词——现在分词转化为名词

boat → boating

build → building

begin → beginning

cross → crossing

meet → meeting

turn → turning

名词——形容词

friend → friendly

south → southern

wool → woolen

danger → dangerous

difference → different

fry → fried

worry → worried

动词——过去分词转为形容词

break → broken

lose →lost

please → pleased

colour → coloured

动词——名词

know → knowledge

please → pleasure

动词——名词

farm → farmer

动词——现在分词、过去分词转为形容词

follow → following

interest → interested （“感兴趣的” 只作表语，

仅用于be interested in）

interest → interesting “有趣的”

可作表语和定语

develop → developed “发达的”

develop → developing “发展中的”