新概念英语第二册语法总结（4）
10. 被动语态：结构：be+过去分词
用法：
u 主语不清或不需要提及时
I was born in 1999. The apple was eaten.
u 强调不同的主语时，为了说明动作是谁做的，用by+动作执行者
The policeman caught the thief. The thief was caught by the policeman.
Be made in/be made of/be made from/be made by
双重名词所有格：
one of +形容词性物主代词/名词所有格+名词复数
单数名词+of+名词性物主代词/名词所有格
one of my father’s friends/a friend of my father’s
one of my friends/a friend of mine
one of your records/a record of yours
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