it is 与is it的区别我经常弄不清楚这两个的区别,比如说问句中经常弄反.怎么去区别而正确写出答案

it is 与is it的区别我经常弄不清楚这两个的区别,比如说问句中经常弄反.怎么去区别而正确写出答案 It is 与 Is it的区别 what time is it 与when is it 的区别 so is it 与 so it is的区别 I don't think it advisable that为什么不加is与It is advisable that句型的区别 It is most...与It is the most的区别例句：It is most important to combine theory with practice.为什么不加the? Is it your book Yes,it is .与 Yes,it's mine.回答的区别? what colour it is与 what colour is it 区别 it is与is it用法区别是什么? nor it is与nor is it有什么区别 it和is的区别 it is convenient for it is convenient to的区别it is convenient for 与 it is convenient to的区别是什么? this is ...和it is...的区别 请问：HERE IT IS与HERE YOU ARE的区别?不都是给你的意思吗? It has gone与It is gone的区别?shot与photo的区别? It is for sb to do sth 与It is doing sth的区别 it is important for sb与it is important to的区别 It is clear that与it is certain that的区别