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状语从句在复合句中担任状语成分，能够表示时间、地点、原因、目的、结果、条件、行为方式等多种意义。连接词是连接状语从句和主句的关键，包括不同的状语从句常用的连接词和一些特殊连接词。

连接词举例如下：

时间状语从句：when、whenever、while、as、before、after、until等。

原因状语从句：because、as、since、why等。

等等，还有一些常用的连接词，如so...that、such...that等用于表示结果状语从句，if、unless等用于条件状语从句。

接下来，我们将通过一些例句来进一步说明状语从句的用法。

例句解析：

1. When you arrive in a new city, it's important to know where to find information about the local area. (时间状语从句)

2. Although it was a difficult decision, she finally made up her mind to leave her job. (让步状语从句)

3. I will do my best to help you, even if it means staying up all night. (即使...也...条件状语从句)

小试牛刀：

1. _____ Keller was so absorbed in the work that she often forgot to take meals. (答案：D. So absorbed was Keller doing/in the work that…)

2. Only _____ the painting _____ you can decide whether it is worth buying. (答案：C. Only when he sees the painting can he…)

答案：

1. D 2. C 3. B 4. B 5. C 6. D 7. D 8. B 9. A 10. A