被动语态怎么用？？

Question

被动语怎么用，我不要从网上复制的，最好是简单地几句话。
结构我也要，还有时态。
请问句子中的by是不是每个被动语态都要加的？

Answer 1

【被动语态的主要用法】
■当不知道或没有必要指出动作的执行者时，常用被动语态，这时往往不用by短语。
The front window in the classroom was broken yesterday.
昨天，教室的前窗被打破了。(不知谁打破的)
They have been poorly paid.
他们的工资太低。(没必要指出工资是谁付的)
■突出或强调动作的承受者，如果需要说出动作的执行者，用by短语。
The time-table has been changed.
时间表已变动了。(要突出的是“时间”)
These books are written especially for children.
这些书是专门为孩子们写的。(强调的是“”这些书)
■为了使语言得体或圆滑等不愿意说出动作的执行者。如：
You are requested to make a speech at next meeting.
请您在下次会议上作个发言。
It is said that she is going to be married to a foreigner.
据说她要嫁给一个外国人。
■出于修辞的原因，或是说为了更好地安排句子。如：
It is generally considered impolite to ask one’s age, salary, marriage, etc. .
问别人的年龄、工资、婚姻状况等通常被认为是不礼貌的。
The notion is especially opposed to by those who have invested much in the area.
这个提议特别遭到了那些在本地区投资很大的人的反对。(因those的定语太长了，若用它作主语，主语与谓语就相距太远而显得句子松散。)

Answer 2

和中文中的把字句和被字句的转换类似，e.g：i hit him or he is hit by me. by就是被的意思，你想一下意思就知道加不加了，有被的意思就加，没有就不用了

Answer 3

这是我自己整理的,希望对你有帮助.（每个公式中的done表示过去分词）
1.一般现在时.
is/am/are+done
e.g:you're
wanted
on
the
phone.
2.现在进行时.
is/am/are+being+done
e.g:The
homework
is
being
written
(by
Tom)now.
3.一般将来时.
will/shall
be+done
e.g:The
car
will
be
repaired
（by
him）tomorrow.
4.现在完成时.
have/has
been+done
e.g:Many
bridges
have
been
repaired.
5.一般过去时。
was/were+done
e.g:He
is
seen
to
go
out
of
school.
6.过去进行时。
was/were+doing+done
e.g:The
room
was
being
cleaned
this
time
yesterday.
7.过去将来时。
would
be+done
e.g:He
told
us
that
the
new
railway
would
be
built
the
next
year.
8.过去完成时。
had
been+done
Our
classroom
had
been
cleaned
last
Tuseday.

Answer 4

你好！
被动语态就是BE+动词过去分词

例如
I gave him a book.
被动语态就是A book was given to him (by myself).
这个就是被动语态

时态什么的就是看原句的时态是什么
根据原句来修改就是了

谢谢本回答被提问者采纳

Answer 5

被动语态就是..be +动词的过去分词. 不知道你觉得这个够简单不.

举例
我吃一个苹果
I eat an apple (一般现在时)
An apple is eaten by me (被动语态)

也就是把宾语和主语换一下,变成一个苹果被我吃了

跟随补充: 加by就是多一个主语. 也不是每个都要加的. 因为有些动作必须要两个以上的角色来完成,比如苹果不能自己把自己吃了,所以要被我吃了. 加上就是强调了另外一个主语. 如果说机器被修好了, is fixed ,那么被谁修好的不重要,就不需要by了.