Here are some common examples of subordinating conjunctions:
Time:
* After: After the rain stopped, we went for a walk.
* Before: Before we left, we packed our bags.
* Since: Since you've been gone, I've missed you.
* While: While I was reading, the phone rang.
Cause/Effect:
* Because: Because it was raining, we stayed inside.
* Since: Since you're tired, you should go to bed.
* As: As the sun set, the sky turned orange.
Contrast/Comparison:
* Although: Although it was cold, we went swimming.
* Though: Though he was tired, he kept working.
* Even though: Even though she was nervous, she gave a great speech.
* While: While she's tall, her brother is short.
Condition:
* If: If you study hard, you will pass the test.
* Unless: Unless you study hard, you will not pass the test.
* Whether: Whether you like it or not, you have to go.
Other:
* That: I know that you are right.
* Which: The book which I borrowed is very interesting.
* Who: The man who lives next door is a doctor.
* Whom: The person whom I spoke to was very helpful.
* Whose: The woman whose dog ran away is very upset.
Note: Subordinate clauses can also be introduced by relative pronouns (who, whom, whose, which, that) when they function as adjectives modifying nouns in the independent clause.