this is a apple和this is apple有什么区别

this is a apple和this is apple有什么区别 this is a apple和here's a apple区别 this is a apple改错 this is a （apple） This is ________(apple) whose apple is it 与whose apple is this有什么不同 请问this is a red apple for you 和this a red apple is for you 这 This is [you] apple对吗 What color is this apple? this is an apple 和 this is apple 哪个语法是正确的 This red apple is big.It is _big apple.a.an b.a c.\ This apple is twice bigger than that apple. =This apple is t