同位语的概念是什么？
同位语：当两个指同一事物句子成分放在同等位置时，一个句子成分可用解释另一个句子成分，前者就叫做后者的同位语，这两个句子的成分多由名（代）词担任，两者的语法形式相同，但功用不同，同位于通常多放在其所说明的名代词之后。
例：we have two children ,a boy and a girl.
分词作宾语补足语和主语补足语其实是同一成分用于两种不同的句式中。具体地说，主动态句子中的宾语补足语就是被动态句子中的主语补足语。分词作宾语补足语时，如果分词与宾语构成"主谓关系"，用现在分词；如果构成"动宾关系"，则用过去分词。常用分词作宾语补足语的动词有：find , feel , get , have , hear , keep , notice , see , watch等。例如：
When I passed by his office , I found John reading something carefully .
（宾语补足语）我经过约瀚的办公室时，发现他正在认真地看什么文件。
I heard my sister singing that song in English outside.
（宾语补足语）我听到妹妹在外面用英文唱那首歌。
My sister was heard singing that song in English outside.
（主语补足语）有人听到我妹妹在外面用英文唱那首歌。
They once heard the song sung in English.
（宾语补足语）他们曾听见有人用英文唱那首歌。
The song was once heard sung in English.
（主语补足语）有人曾听见那首歌被人用英文唱过。
英语同位语举例说明
英语同位语举例说明如下：1、She hasn't made the decision whether she should give up。 她还没决定她是否应当放弃。2、I have no idea what has happened to him。 我不明白他发生了什么事。3、There was no doubt that he is honest man。 毫无疑问他是诚实的人。4、You have no idea how worried I was。 你不明白我当时有多担忧。5、I have no idea why he resigned。 我不明白他为何辞职。6、They were worried over the fact that you were sick. 他们为你生病发愁。7、The news that we are having a ho1 iday tomorrow is not true.明天放假的消息不实。8、We are not investigating the question whether he is trus tworthy.我们不是在调查他是否可以信任的问题。9、Answer my question whether you are coming. 你回答我的问题:你来不来。10、 Have you any idea what time it starts?你知道什么时候开始吗?
