although較正式，語氣強；though較常用。現代英語中兩者可隨意換用。如：

Though he was tired, he went on working. =Although he was tired, he went on working.

although和though引導的從句放在主句前後均可，有時還可放在句中。如：

He often helps me with my English (al)though he is quite busy. 儘管他相當忙，但是還常常幫我學英語。

Although many difficulties are still ahead, we are determined to make greater achievements. 儘管在前面的道路上還有許多困難，但是，我們決心要取得更大的成就。

although/though引導的從句不能與but/however連用，但可與yet/still連用。不能說：Though he was old, but he worked hard. 應把but去掉。當然，保留but而去Though也可。

though有時指假設的情況，不指事實，從句用虛擬語氣；although不能這樣用。如：

Einstein cared little for money, though he could have been very rich. 儘管愛因斯坦本可以成為非常富有的人，但他對金錢卻不感興趣。(though引導的情況是假設的而不是事實）

He will never do such a thing though he (should) be forced to. 即使強迫他，他也決不會幹這樣的事。（注意：不能用is）

though引導的從句，可用倒裝語序，即把從句中的表語或狀語放到though之前；although卻不能這樣用。如：

Young though she is, yet she is fit for the job. （=Young as she is, yet she is fit for the job.）儘管她很年輕，可她還是勝任這項工作的。

though從句的主謂語若是系表結構時，可以省略從句主語和be動詞。如：

Though alone, he is happy. 雖然他獨自一人，卻很幸福。

注意：Though loving him, I can not help him. 是錯句。因為從句不是be構成的系表結構作謂語。應改為：Though I love him, I can not help him. 或 Though fond of him, I can not help him.

though還可與別的詞結合使用，如even though, as though等；although則無這種搭配功能。如：

I'll go and help them even though I stop my work. 即使我停下自己的活不幹，我也要去幫助他們。

though還可作並列連詞，相當於and yet（然而，可是），它引導的分句常對另一分句起補充說明作用；although則無這種用法。如：

I wouldn't like to go to the evening, though they will invite me to. 我不想去參加晚會，可是他們要請我去。

They now can do most of the things people can do, though most scientists agree that computers can not completely take the place of humans. 人們能做的大部分工作，計算機現在都能做，然而大多數科學家認為，計算機並不能完全代替人類。

though可用作副詞，放在詞尾。although卻不可這樣用。如：

He said he would come, he didn't, though. 他說要來卻沒來。

區別如下：

一、詞性方面

although只能作連詞，though不僅可以作連詞，而且還可以作副詞，含義是“不過，然而”。

例句1：Although/Though he is young,he looks very old.(雖然他年紀很小，但是看起來很老。)

句子中although或though作從屬連詞，引導讓步狀語從句。

例句2:He had a fight with her yesterday.They are still good friends now,though.(昨天晚上他和她打了一架，不過他們現在仍然是好朋友。)

在這個句子中，though是副詞。

二、用法方面

1、although所引導的讓步狀語從句一般用陳述語氣，從句所說的內容常指事實，而不指假想；而though所引導的從句卻可以用來表示假設或推測，從句既可以用陳述語氣，也可以用虛擬語氣。

例句1：Although the box is very small,it is really useful.(儘管這個箱子很小，但它真的非常有用。)

在這裡although引導的從句陳述的是事實而非假設。

例句2：Help her though she may refuse.(幫幫她吧，即使她可能拒絕。)

在這裡though引導的從句用來表示假設或推測。

2、although常用於正式文體中，不能和even、as連用；though常用於口語和非正式文體中，可以和even、as連用。

例句1：He won't go there,even though the library is not far.(雖然圖書館不遠，但他不會去那裡。)

例句2：It looks as though she has gone home.(看起來好像她回家了。)

3、although引導的狀語從句不能使用倒裝形式；though引導的狀語從句位於句首時，既可以使用倒裝形式，也可以用正常語序。

例句1：Although/Though he is poor,he is very happy.(儘管他很窮，可是他很快樂。)

這裡although/though引導的讓步狀語從句採用正常語序，此時although和though可以互相替換。

例句2：Poor though he is,he is very happy.(儘管他很窮，可是他很快樂。)

在這裡，though引導的讓步狀語從句Poor though he is採用了倒裝語序，此時就不能用although來代替though。