That young man was seen pulling out___appeared to be a handgun and aiming it at that traffic officA what B which 怎么判断它不是定于从句的

That young man was seen pulling out___appeared to be a handgun and aiming it at that traffic officA what B which 怎么判断它不是定于从句的
That young man was seen pulling out___appeared to be a handgun and aiming it at that traffic offic
A what B which 怎么判断它不是定于从句的

That young man was seen pulling out___appeared to be a handgun and aiming it at that traffic officA what B which 怎么判断它不是定于从句的
因为这个从句前面没有先行词.
整个从句作pull out 的宾语
那个年轻男子被看见拿出【类似手枪的东西】,而且what在从句部分中作主语.

因为这是特别明显的宾语从局。

定语从句是要在句子里面做定语的，
先搞清楚什么是定语从句。
定语从句的功能是要去修饰先行词，被修饰的名词、词组或代词就是我们说的先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。
这个句子当中what引导的从句部分表示的正是waht that young man was seen pulling out,不存在修饰关系，只是pull out 的宾语，...

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定语从句是要在句子里面做定语的，
先搞清楚什么是定语从句。
定语从句的功能是要去修饰先行词，被修饰的名词、词组或代词就是我们说的先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。
这个句子当中what引导的从句部分表示的正是waht that young man was seen pulling out,不存在修饰关系，只是pull out 的宾语，所以这个句子当中what引导的是一个宾语从句。

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