构成方式 例词 副词＋名词 inside(在......里面) 介词＋副词 within(在......之内) 副词＋介词 into(进入) 注意：(1)由"可数名词＋介词(短语)"构成的复合名词变复数时，把前面的名词变复数。例如：father­in­law→fathers­in­law，passer­by→passers­by；

(2)由man和woman构成的合成名词变复数时，两个名词都要变成复数。例如：woman doctor→women doctors；

(3)由"名词＋名词"构成的复合名词，在变复数时，只变化中心名词，而修饰名词不变。例如：girlfriend→girlfriends。

即时跟踪1　

根据构词法，猜测下列句子中画线单词的汉语意思

1.He has invented a sun­powered car which is very friendly to the environment.以太阳能为动力的

2.I have rented a house in the city centre，and my landlady is very kind to me.女房东

3.She is a very short­sighted girl and she can't consider the interest of the future at all.目光短浅的

4.Don't do it until last moment.You should do it before­hand.事先

5.Perhaps she can't be admitted into a medical university because she is color­blind.色盲的

6.If you are still having a headache，take this painkiller.止痛药

7.As we all know，most glass is usually see­through.透明的

8.This is an evergreen tree.I like it very much.常绿的

9.You are absent­minded again.Please listen to the teacher carefully.心不在焉的

10.I'm told that his newly­bought shirt is dark blue.新买的

二、派生(Derivation)

派生法是由一个词根加上前缀或后缀构成另一个词。

1.前缀

前缀一般只改变单词的意思，不改变词性。

分类 举例 常见否定前缀 il­ illegal非法的 un­ unhappy不高兴的 im­ impatient不耐烦的