the reason for後接名詞性短語或者名詞, the reason why 後接原因狀語從句

都是對的,但後面接的語言材料不同

如：他遲到的原因the reason for his being late=the reason why he wa slate

可見：the reason for 接名詞,代詞,v-ing形式the reason why 接句子

例句:

The reason for my dissatisfaction is that the book is a pirated one.

這個句子中肯定是用reason for. 因為my dissatisfaction只是一個名詞短語

①the reason for +短語

如：The reason for the change is lack of money.

②the reason why + 從句

如：The reason why I beat you is that you do not obey the order

The reason for my visit had obviously slipped his mind.

我到訪的原因顯然被他忘了

Kenny explained the reason for his sudden return to Dallas.

肯尼解釋了他突然返回達拉斯的理由。

Detectives are so far at a loss to explain the reason for his death.

至今偵探仍茫然無法解釋他的死因

The reason for the interview is twofold: we want to find out what he can tell us, plus we also want to find out what condition he is in.

這一採訪的原因有兩個：我們既想看看他能告訴我們些什麼，也想弄清他的處境如何。