表達某事的「原因」英文句型：「the reason why」
今天要教大家如何用英文陳述「原因💬」，句型為 the reason why S+V ，其中的why為關係副詞，引導形容詞子句修飾先行詞 the reason。此用法中的 why 常可省略，或以 that 替代。來看例句：
▸ the reason (why/that) + S + V 當受詞或補語：
I don't know the reason (why/that) Tyler is always naughty.
我不知道為什麼泰勒總是很頑皮。
→ the reason (why/that) Tyler is always naughty 作為動詞 know 的受詞。
The teacher wants to know the reason why/that Isabel didn't do her homework.
老師想要知道伊莎貝兒為什麼沒寫作業。
The teacher wants to know the reason why/that Phoebe cheated on the test.
老師想要知道菲比為什麼考試作弊。
Jeff's gentle manner is one of the reasons why Mary fell in love with him.
（reason為複數時通常不會以that替代why）
（reason為複數時通常不會以that替代why）
傑夫溫柔的舉止是瑪麗愛上他的原因之一。
* The cheap yet delicious food in Taiwan is one of the reasons why Carey likes coming here for vacation.
（reason為複數時通常不會以that替代why）
台灣便宜又好吃的美食是凱莉喜歡來這度假的原因之一。
▸ the reason (why/that) + S + V 當主詞時，常搭配 that 名詞子句作為主詞補語，句型如下：
The reason (why/that) + S1 + V1 ... beV (that) S2 + V2…
The reason why/that Elaine quit school was that she needed to take care of her sick mom.
依蓮之所以休學是因為她要照顧生病的母親。
The reason (why/that) Johnny is so excited is (that) tomorrow is his birthday.
強尼這麼興奮的原因是因為明天是他的生日。
The reason (why/that) Susan cried was (that) her toy broke.
蘇珊哭泣的原因是因為她的玩具壞了。
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