this is a apple和here's a apple区别

this is a apple和here's a apple区别
this is a apple和here's a apple区别

this is a apple和here's a apple区别
灰常简单,my dear.前者 意思是 这是一个苹果
后者是,这里有一个苹果.

前者是给不认识苹果的人介绍说这个就叫苹果
后者是这里有一个苹果
还有，a改成an