A dependent clause is a group of words which contain a subject and verb, but cannot stand on its own.  It will usually begin with words like after, although, because, unless, and when.  The key word is dependent. It is dependent upon something else in order to become independent.

Examples

1. Unless you do your homework

2. After we had dinner

3. When we walked home

4. Although the suspect may have an alibi

There are other grammar elements that can also be dependent clauses:

1. Introductory phrase -   On the other hand

2. Introductory words – Well, yes, no, usually

3. Transitional phrase – Around the corner,  From a distance,  Between the buildings, In conclusion, Furthermore, In addition, etc. etc. For more information on transitional phrases, visit The Writer's Handbook.