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《Grammar and usage(1)： The passive voice；Modal verbs and the passive voice》精品PPT课件优质课下载
The man _________(call) “ Good husband”.
is called
The pet dog ________________(treat) now by the nurse.
is being treated
A frog __________ ( catch) by a big bird just now.
was caught
The man is called “ Good husband”.
The pet dog is being treated now by the nurse.
A frog was caught by a big bird just now.
They are all passive voice！（被动语态）
What is passive voice？
一、被动语态的定义：
语态是动词的一种形式，用以表示主语和谓语之间的关系。当主语是谓语动作的执行者，则为主动语态；当主语是谓语动作的承受者，则为被动语态。
My father writes the book.
The book is written by my father.
Find the differences?
Difference:
1. The position of subject and
object (主语和宾语的位置)
A...B B...A
2. The form of verb (动词
的形式)
verb be+v-ed
被动语态由助动词be+及物动词的过去分词构成，时态通过be表现出来。
二、几种常见时态的被动语态的构成（以do为例）