今日目标：掌握名词的复数形式5个小知识点
1.一般名词的复数形式：+s或者es, 或者改y为i+es. Girls, classes, cities, lives, beliefs Man-men 不规则的变法：thesis-theses
2.合成词的复数：girlfriends, sons in law, women doctors
3.一些其他复数形式：1980‘s
4. 单复同行的情况：
This sheep is from Australia./ Farmers keep sheep for their wool.
表示某国人的名词：She is a Chinese./ The Chinese were then a highly civilized people.
Wheat is a species of grass.
Fruit 水果做集体名词的时候没有复数形式：Would you like some more fruit?
表示某种水果的时候可有复数形式：Greece has some wonderful fruits.
5. 用于复数形式的词 pants, surroundings, arms, goods, go to the pictures, working conditions.
