老大the door was closed.和the door was closed by me.今天学着学着就想到了这

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老大the door was closed.和the door was closed by me.今天学着学着就想到了这个问题
老大当系动词+过去分词表系表结构时与系动词+过去分词表被动语态时,我知道当系动词+过去分词表系表结构,但表被动时第2个句子中的was 和closed 还是系表结构?还是说此时was已毫无意义与was closed一起充当谓语吗,简而言之被动式中系动词和过去分词意义何在,在结构上分别充当什么?

很好的问题.这实际是区分：“系动词＋过去分词” 和 “被动语态”,也即：系表结构和被动语态的区别.
再说白些,就是这里的动词closed,是一个动词（过去式）还是形容词?
『内容觉得一切』
系表,描述的是一种｛状态｝,用英文说明,linking verb ＋ predicative （to state or affirm as an attribute or quality of something）,这里的predicative清楚表明,就是对subjective的属性的说明.而这时被弱化的是verb,只起linking（连接,桥梁）的作用.The door was closed.－－－如果按系表理解,就是：问,（）,关着.（有点像说：你de,鬼子话的干活～）
而被动语态,说白了,还是一个动词,强调的是动作,只不过这个动作,subject本身不能自主地去完成,而是后面的by.完成的.因此倒转过来和被动的句子,是标准的一一对应（意思完全一样,门是我关的＝我关的门,只是不同说法而已）,the door was closed.完全没这个感觉,只是客观地,站在第三方立场上称述一个事实,门是关着的,是谁关的?有什么影响和后果,完全不涉及.
－－－理解了这个区别后,下面才是判断或认定的标准.由于没有上下文和语境,没有办法清楚的根据内容判断这里的closed是动词还是形容词,因此只能：
① 能否后面添加by.,如果能,比如这句：The door was closed 后面可以＋by＋,那么一般认为这就是被动语态.
② 看看能否把过去式当形容词提前,比如：The closed door was .-- 这也是成立的,因此closed也可当形容词.
③ 替换系动词be,为seem,appear,look,remain等其它系动词.
The door seemed/appeared/looked/remained closed.-- 这也成立.
④ 添加too,very等能修饰形容词的副词；
The door was much/too closed.－－－不成立!因此,这里的closed不是形容词.－－是动词（被动语态）
因此结论：没有上下文的前提下,这里的was closed是被动语态.
至于“被动式中系动词和过去分词意义何在,在结构上分别充当什么?” －－既然区分了,v-ed是动词（被动）还是形容词,那么意义和成分就不言而喻了吧?!

The door was closed by me 和The door was closed 的区别 the door was closed by me the door was closed,the window 17.– Who closed the door?-- Nobody.It ______.A.was closed by the door was closed the door is closed有什么区别,都是在表示状态吧? as soon as the door closed还是as soon as the door was closed? -Who closed the door? The door was ______when I arrived中应添closed, I found the door was open(closed).=I found the door open (cl Why is the door closed? he was so mad at____she was doing that he closed the door he Make the door be closed 和 Make th door is closed. 哪个对? 为什么?