用why造定語從句
英語學(xué)習(xí)最基礎(chǔ)的就是詞匯量的積累，大量的詞匯積累是我們學(xué)習(xí)英語最重要的。小編為大家精心準(zhǔn)備了用why造定語從句，歡迎大家前來閱讀。
用why造定語從句如下：
The reason why he came is not very convincing.
Please tell me the reason why you missed the plane.
I don’t know the reason why he looks unhappy today.
I don’t know the reason why he came so late. 我不知道他來得那么晚的原因。
That is the reason why I don’t want to go. 那就是我不想去的理由。
He didn’t tell me the reason why he was so upset.他沒有告訴我他為什么那樣心煩意亂。
延伸閱讀：
關(guān)系代詞引導(dǎo)的定語從句
關(guān)系代詞所代替的先行詞是人或物的名詞或代詞，并在句中充當(dāng)主語、賓語、定語等成分。關(guān)系代詞在定語 從句中作主語時(shí)，從句謂語動(dòng)詞的人稱和數(shù)要和先行詞保持一致。
1）who, whom, that
這些詞代替的先行詞是人的名詞或代詞，在從句中所起作用如下：
Is he the man who/that wants to see you?
他就是想見你的人嗎？（who/that在從句中作主語） He is the man whom/ that I saw yesterday.
他就是我昨天見的`那個(gè)人。（whom/that在從句中作賓語）
2) Whose 用來指人或物，(只用作定語, 若指物，它還可以同of which互換）, 例如：
They rushed over to help the man whose car had broken down. 那人車壞了，大家都跑過去幫忙。
Please pass me the book whose (of which) cover is green. 請(qǐng)遞給我那本綠皮的書。
3）which, that
它們所代替的先行詞是事物的名詞或代詞，在從句中可作主語、賓語等，例如：
A prosperity which / that had never been seen before appears in the countryside. 農(nóng)村出現(xiàn)了前所未 有的繁榮。（which / that在句中作主語）
The package which / that you are carrying is about to come unwrapped. 你拿的包快散了。(which / that 在句中作賓語）
關(guān)系副詞引導(dǎo)的定語從句
關(guān)系副詞可代替的先行詞是時(shí)間、地點(diǎn)或理由的名詞，在從句中作狀語。
1）when, where, why
關(guān)系副詞when, where, why的含義相當(dāng)于"介詞+ which"結(jié)構(gòu)，因此常常和"介詞+ which"結(jié)構(gòu)交替使用，例 如：
There are occasions when (on which) one must yield. 任何人都有不得不屈服的時(shí)候。
Beijing is the place where (in which) I was born. 北京是我的出生地。
Is this the reason why (for which) he refused our offer? 這就是他拒絕我們幫助他的理由嗎？
2）that代替關(guān)系副詞
that可以用于表示時(shí)間、地點(diǎn)、方式、理由的名詞后取代when, where, why和"介詞+ which"引導(dǎo)的定語從 句，在非正式文體中that常被省略（正式文體中不可省略），例如：
His father died the year (that / when / in which) he was born. 他父親在他出生那年逝世了。
He is unlikely to find the place (that / where / in which) he lived forty years ago. 他不大可能找到他四十 年前居住過的地方。
定語從句中why的用法
請(qǐng)分析下面兩個(gè)簡(jiǎn)單句：
句①He wanted to know the reason.
句②I was late for the reason.
把句②變?yōu)榫洧俚亩ㄕZ從句，句①中的the reasons做定語從句的先行詞。因?yàn)閠he reason做介詞for的賓語，先行詞是the reason指物，在定語從句中介詞for提前，用關(guān)系代詞which替代the reason，the reason就不能在定語從句中出現(xiàn)了。由此得到句③He wanted to know the reason for which I was late.
注意：在定語從句中當(dāng)先行詞為the reason(s)，定語從句由for which引導(dǎo)時(shí)，可以用why代替for which。由此我們得到句⑤He wanted to know the reason why I was late.
請(qǐng)把下面兩句話合并為一句，把第二句話變?yōu)榈谝痪涞亩ㄕZ從句。
The reason is not very convincing.
He came for the reason.
→The reason why he came is not very convincing.
The reason for which he came is not very convincing.
定語從句
定語從句，一個(gè)簡(jiǎn)單句跟在一名詞或代詞后（先行詞）進(jìn)行修飾限定，就叫做定語從句。在主句中充當(dāng)定語成分。被修飾的詞叫先行詞。定語從句不同于單詞作定語的情況，它通常只能放在被修飾的詞（即先行詞）之后。
定語 從句由關(guān)系詞（關(guān)系代詞、關(guān)系副詞）引導(dǎo)，關(guān)系代詞、關(guān)系副詞位于定語從句句首。
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