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二、特殊情況

如果就此認(rèn)為although 永遠(yuǎn)不與but連用， 那也是錯(cuò)誤的，請(qǐng)看兩例：

(1) But I didn’t know that then, although I learned it later. 但我當(dāng)時(shí)的確不知道此事，盡管后來我還是知道了。

此句既用了并列連詞 but，又用了從屬連詞 although，但它并未造成錯(cuò)誤，原因是此句與上面所討論的情形有所不同，即此句 but 用于 although 之前，but 在此僅起到與上文轉(zhuǎn)折的作用，but 后的 I didn’t know that then, although I learned it later.仍為一個(gè)復(fù)合句。

(2) I tried doing the accounts, but although I knew some maths I found it very difficult. 我試著算這些賬，但盡管我懂點(diǎn)數(shù)學(xué)，仍感到很困難。

此句將 but 與 although 用在一起，但此句也沒有錯(cuò)誤。該句從總體來看，它是一個(gè)以并列連詞 but 連接的并列句，而在該并列句的后面一句又是一個(gè)包含讓步狀語從句 although I knew some maths 的復(fù)合句——這種句型就是所謂的并列復(fù)合句。此句也可改寫為 I tried doing the accounts, but I found it very difficult although I knew some maths.