though
1.关于though和although的不同，下面几点该注意：
（1）though可以用作副词，作“但是”解。但although不可，如He said he would come, he didn't, though里的though不可改作although。
（2）as though中的though不可改作although。参见as 18
（3）although比though正式而语气重，不及though通俗。
（4）although所引导的从句，通常指事实而不指设想，如下面第一句里用though，第二句里用although：
- He would not be unhappy though he should have to live alone. （他即使不得不独自居住也不会不快乐。）
- He was not unhappy although he had to live alone. （他虽然不得不独自居住，却并不不快乐。）
下面两句里的though不可改作although：
- Let's not defer the trip though it rain (不用rains) tomorrow.
- Though everybody desert (不用deserts) you, I will not.
2.下面三句意思相仿：
- Though he lives alone, he is happy.
- Though he lives alone, yet he is happy.
- He lives alone, but he is happy.
注意不可说Though he lives alone, but he is happy。though..., but...是错误的。though..., nevertheless...和though..., still...都可以用，但都不及though..., yet...普通。
3.可以说Though alone，he is happy和Though annoyed，I consented。alone前面省去he is, annoyed前面省去I was。注意下面两句都不可说：
- Though loving him, I cannot help him.
- Though disliking the work, he had to do it.
though loving和though disliking都不可说，因为though I was loving和though he was disliking都不可说。该把loving改作I love，把disliking改作he disliked。
4.比较下面每组里的两句：
- Though she was a child, the actress was drawing a crowd.
Child though she was, the actress was drawing a crowd. - The book, though it is a masterpiece, is far from popular.
The book, masterpiece though it is, is far from popular.
每组里的第二句比第一句语气重，注意第二句里的child或masterpiece前面没有a。
