序數詞前不加the的三個例外

1、序數詞前有形容詞性物主代詞。如：my first time。

2、序數詞前有名詞所有格形式。如：Tom's third car。

3、不表示順序，僅表示再一，又一意思時。如：The rich man has bought two cars But he wants to buy a third one this week。