policeman复数形式是policemen。policeman是名词，意思是男警察，名词的单数变复数是不规则变化，与woman、man的变化一样，把a变成e。
一、policeman发音
英[pəˈliːsmən]
美[pəˈliːsmən]
二、短语搭配
military policeman宪兵 ; 军事警察 ; 秘密发展的在宪兵
policeman uniform警服
Fat Policeman胖警察
freshly policeman新警学员
forest policeman森林警察
economic policeman经济警察 ; 经警
station policeman布置警察
armed policeman武警
special policeman特警 ; 号兵
三、双语例句
1.I like policeman because they have motorcycles.
我喜欢警察，因为他们有摩托车。
2.But I like my father, because he is a good policeman.
但是我仍然很喜欢我的爸爸，因为他是一个好警察。
3.A policeman was injured in the line of duty yesterday.
昨天有一名警察在执行公务时受伤。
4.As I had suspected all along, he was not a real policeman.
他并不是真的警察，我一直就觉得不像。
5.The policeman wanted to see all our documents.
警察想查看我们所有的证件。
6.The policeman opened the door and looked in
警察打开门朝里面看。
