为什么用It is my aunt,不用She is my aunt据我所知it使用在不知道是男还是女的情况.但是,aunt是姑姑,肯定是女的,为什么不用she而是用it.（新概念2看见的）

为什么用It is my aunt,不用She is my aunt据我所知it使用在不知道是男还是女的情况.但是,aunt是姑姑,肯定是女的,为什么不用she而是用it.（新概念2看见的） （ what ）is she -------she is my aunt 为什么用what 而不用 who where.is.your.aunt.from?为什么用is不用are My aunt is busy,she has to look after her baby.It's only three months old.为什么用“it”? it __(is /was )dark outside .it __(is /was )my aunt lucy.为什么? I hear that John is going to Paris next month,don't I ?为什么用don't I?为什么不用isn't he 喃?It is five years since my dear aunt ____left____here.为什么用left不用 has left?Nobody in ____ right senses would play such a silly joke.A the She is her aunt.变成复数形式Those are my backpack,backpack用不用加s Is that your aunt 的肯定回答用Yes,she is.还是,Yes,it is,为什么 It is ten years since my aunt worked here.为什么整句话表示的是aunt已不在这里工作了? No it is Helen. l left mine at home.为什么用mine而不用my呢 Let them not swim in the river为什么要用not不用do notHe lives in Shanghai.为什么不能加写成He is lives in Shanghai.My aunt lives in the United States.为什么要用lives in it is my cousin.为什么用的it,不用she.前提是已经知道cousin是为女性. My favorite food is fish为什么用My 不用I 下面这个空上该填什么,按规定用Is this提问应用it is来回答,可这里后面又是my aunt son.,咋办?Is this your brother?No,_____isn't.He is my aunt son. My aunt is a nurse A:is she your aunt?B:()().she is my motherA:()B:yes,it is .it's my brother mother your my aunt is 连词成句 isn't it my friend连词成句 it is five years since my dear aunt ( )herea leftb has been leavingc is left d had left选哪个?为什么?