定義

常見(jiàn)連接詞

dont give up on something justbecauseyou think you cant do it.

--- chanda kochhar, ceo of icici

cherish your visions and your dreams,asthey are the children of your soul, the blueprints of your ultimate achievements.

--- napolen hill, motivational writer

sincetime is not a person we can overtake when he is gone, let us honor him with mirth and cheerfulness of heart while he is passing.

--- johann wolfgang von goethe, writer

復(fù)合句中，用來(lái)表示主句動(dòng)作發(fā)生原因的從句叫做原因狀語(yǔ)從句;他們的位置相對(duì)靈活，可以在句首，句中或句尾。

because 表示直接原因，直接最強(qiáng) (回答why)

why did not he come yesterday?

becausehe was ill. 副詞

he did not come yesterdaybecausehe was ill. 原因狀語(yǔ)從句連詞

因?yàn)樗麄儝甑腻X(qián)比我多，所以他們認(rèn)為自己高人一等。

because they make more money than i do,sothey think they are so superior. 本句中so是不應(yīng)該出現(xiàn)的

正確的是

because they make more money than i do, they think they are so superior.

因?yàn)椋涸谟⑽闹校琤ecause 和so不出現(xiàn)在同一句子中。

because it was raining, we stayed at home

= it was raining, so we stayed at home.

because it was raining, so we stayed at home. 這句話(huà)是錯(cuò)誤的

since 語(yǔ)氣比because弱一些，引導(dǎo)的原因狀語(yǔ)從句通常表示已知的、顯然的理由;通常在句首。

since/now that you dont love him, you should not marry him.

since / now that you are grown, you should make decisions on your own instead of relying on your parents.

顯然已知的理由，但是沒(méi)有because的語(yǔ)氣那么強(qiáng)。

as 附帶說(shuō)明雙方已知的原因，只是對(duì)主句的附加說(shuō)明，重點(diǎn)在于主句。

as he is young, he is not qualified to the task.

i shall not be able to begin the work before i return as i am about to start a journey.

for 并列連詞，引導(dǎo)的從句并不說(shuō)明主句發(fā)生行為的直接原因，只提供補(bǔ)充說(shuō)明，或表示推斷式解釋?zhuān)�一般不位于主句前，主從句間通常加逗號(hào)。

the day breaks, for the birds are singing.

he went to bed early, because he was tired. 直接的理由

he must be fired, for he went to bed early. 簡(jiǎn)介性的推斷

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