He didn't light the fire though/although it was cold.

Although/though he is quite old, (yet) he still tries to learn more.

I'll try to finish the work myself even if/though it takes me days.

2）whatever, whoever, whichever, whenever, wherever, however 引导状语从句时，分别相当于no matter what/who/which/when/where/how引导的从句，意为"无论......"。例如：

Whatever/No matter what he said, no one believed him.

Whoever/No matter who breaks the law, he will be punished.

Whichever/No matter which job you take, you should try to do well in it.

Whenever/No matter when I need his help, he comes immediately.

Wherever/No matter where you go, never forget your motherland.

However/No matter how busy he was, he would watch TV sports news every night.

注意whatever, whoever, whichever又可引导名词性从句，注意区别。可参阅本章第一节。

3）as引导让步状语从句要倒装，其结构通常是"n./adj./adv. + as + 主语+谓语(+其它成分)，主句"，可转换成though/although从句。

Child as he is, he knows a lot. （注意：名词前不用冠词）

=Although/Though he is a child, he knows a lot.

Difficult as the task was, they managed to finish it in time.

=Although/Though the task was difficult, they managed to finish it in time.

Much as I like it, I will not buy it.

=Although/Though I like it much, I will not buy it.

偶尔也可见用动词提前的让步状语从句。例如：

Try as he may, he can hardly do better than she.

=Although/Though he may try, he can hardly do better than she.

4）whether...or也可引导让步状语从句，相当于"no matter whether...or"。

Whether you come in winter or in summer, you will find it a nice place.

=No matter whether you come in winter or in summer, you will find it a nice place.

Step 2: 高考链接

1. ____ he has limited technical knowledge, the old worker has a lot of experience. (2006全国I)

A. Since B. Unless C. As D. Although

2. ____ you've tried it, you can't imagine how pleasant it is. (2006北京)

A. Unless B. Because C. Although D. When

3. If you are travelling ____ the customs are really foreign to your own, please do as the Romans do. (2006天津)

A. in which B. what C. when D. where

4. In time of serious accidents, ____ we know some basic things about first aid, we can save lives. (2006重庆)

A. whether B. until C. if D. unless