1.although和though同義，在一般情況下，可以互換使用。只是though較普遍，常用于非正式的口語或書面語中，而although則較為正式。另外although語氣比though重，常用以強(qiáng)調(diào)讓步概念，如：

Though/Although my car is very old, I don't want to buy a new one. 

雖然我的汽車很舊，但我不想買一輛新的。

He insisted on doing it although I warned him not to.

雖然我警告他不要做，但他仍然堅(jiān)持要做。

He was in love with her, although he did not put that name to it.

他愛著她，雖然他沒有將其稱為愛。

2.even能和though組合表示強(qiáng)調(diào)，但even不能和although組合。因此，不能說even although，在這里even though=even if(no matter if; though即使……也……)，如：

Even if/Even though we could afford it, we wouldn't go abroad for our vocation.

即使我們付得起這筆錢，也不出國度假。

3.當(dāng)讓步狀語從句指某種假設(shè)情況時(shí)，通常用though，而不用although。如：

Though all the world were against me, I should still hold to my opinion.

就算全世界都反對我，我還是堅(jiān)持我的立場。

Though everybody deserts you, I will not.

即使所有人都拋棄你，我也不會(huì)的。

4.though可以獨(dú)立用作副詞，常放在句末，意為all the same (還是；仍然)或however(可是；然而)，而although無此用法。如：

She didn't tell me what she had done, but I know it though.

她沒有告訴我她所做的事情，但我還是知道了。

It's hard work. I enjoy it, though.

工作很苦，可是我喜歡。

5.though引導(dǎo)讓步狀語從句時(shí)可以倒裝，而although從句則不能。如：Bravely though they fought, they had no chance of winning.

雖然他們打得很勇敢，但還是沒有機(jī)會(huì)獲勝。

相同點(diǎn)：

1.在although和though引導(dǎo)的讓步狀語從句中，主句里不可用but，若要強(qiáng)調(diào)前后兩部分的對比意義，可在主句前加yet或still。如：

Although/Though he has a lot of money, yet/still he is unhappy.

他雖然有很多錢，但并不幸福。

2.although和though引導(dǎo)讓步狀語從句時(shí)，常采用省略形式。如：Although tired (=Although he was tired), he kept on working.

雖然很疲勞，但他繼續(xù)工作。

The problem, though complicated(=though it is complicated), can be solved without much difficulty.

這個(gè)問題雖然復(fù)雜，但解決起來不會(huì)有很大困難。