Question

The cakes are delicious. I'd like to have a thir

The cakes are delicious. I'd like to have a third one as the second one I ate was too small 这句话中为什么是a third one 后面是the second one 什么时候用a 什么时候用the?

Answer 1

强调顺序用the, 表示[再一，又一]时，序数词前面用a/an

追答

意思:蛋糕美味可口。我想再吃一块儿，因为我吃的第二块太小了。

a third one 相当于another one

Answer 2

a+序数词=again
但与数量有关。a second表示【已经吃了一片，第二片太小，故想再吃一片，即第三片】

Answer 3

a 又一再一
the 特指