who'sknocking是什么意思(
who'sknocking是什么意思? -
who's knocking?谁在敲？双语例句1 Who's knocking at the door? It's me.谁在敲门？是我。2 A: Who's it knocking at the door?谁在敲门？
是我表现“现在正在”，用现在进行时，结构：be动词+动词的ing形式。当不知道问的人有几个时，一般用单数。
who's knocking?谁在敲？双语例句1 Who's knocking at the door? It's me.谁在敲门？是我。2 A: Who's it knocking at the door?谁在敲门？
是我表现“现在正在”，用现在进行时，结构：be动词+动词的ing形式。当不知道问的人有几个时，一般用单数。
这里的it是用来指代心目中不太清楚的那个人。这里指＂敲门的那个人。请看我用星号标注部分。
1.A:Who is knocking at the door?B:It's me.（是我）2.A:Who teaches me/us physics?（谁教我/我们物理）B:We teach you.（我们教你/你们）3.A:Hello.I'd like to speak to Mary,please.B:Speaking.Who's calling,please?A:Hi,Mary.This is Tom.（打电话回答人名时用this is…
定语从句中who和whom的区别 -
who和whom都是人称代词，who为主格人称代词(Subject Pronoun), whom为宾格人称代词(Object Pronoun)who，whom 用于指人，who 用作主语、宾语和表语，whom用作宾语。在口语中，有时可用who代替whom，who和whom做宾语时可省略。The girl who often helps me with my English is from England.经常在英语有帮助请点赞。
My mother loves me. （me宾格作动词love的宾语）翻译：我妈妈爱我。（2）Give them some books. （them宾格作动词give的宾语）翻译：给他们一些书。2、可以放在be（am, is, are）动词后面作表语。例句：Who is knocking at the door? It's me.（宾格作句子的表语）翻译：谁在敲门？是我。
英语宾格用法 -
2.人称代词作表语时，一般用宾格，特别是在日常会话中。例：“Who is knocking at the door? ”“It's me. ”/ "It's him"/ "it's her" “谁在敲门？”“是我。”在很正式的英语中也用主格，可以说：It is I.只有一个词的句子用宾格：“Who wants to try?”“Me.”“谁想试一试？
定语从句中，whom只能在从句中充当宾语成分，who既可当主语又可当宾语.但是若是介词后的宾语，只能用whom而不能用who.如：there is nobody who/whom he can turn to for help.没有谁可以让他寻求帮助.这里引导词当宾语，who和whom都行，当然这里既可指人也可指物的that也可以。但是：there is no等会说。
主格是什么意思 -
Who is knocking at the door? It's me.（宾格作句子的表语）谁在敲门？是我。My brother is an engineer.(形容词性物主代词作定语）我哥哥是工程师。Ours is a big country.（名词性物主代词作主语）我们的国家很大。You use yours and I use mine.（名词性物主代词作宾语）你用你的，我到此结束了？。
Who is knocking at the door It's me. 物主代词的用法： 形容词性物主代词只能做定语，修饰名词，相当于形容词. My mother is a nurse in a hospital. Their teacher is ing here. 名词性物主代词可以做主语，宾语和表语，相当于名词. This is my pen, yours is lost.(yours=your pen) The best positi好了吧！