is it 和 it is 有什么区别?

what is it?和what it is?有什么区别 is it 和 it is 有什么区别? is it 和it is 有什么区别 what it is?和 what is it?有什么区别? what it is 和how it is有什么区别 it is funny 和it is fun有什么区别? IT IS SAID和IT 又有什么区别 it is rain 和it rains 有什么区别? it rains和it is rainy有什么区别吗 there is的用法和it is有什么区别 how is it与 what is it有什么区别? what is it 和 what it is 有何区别