subordinate or dependent clause
A clause that does not express a complete thought and cannot stand alone.
After, although, as, as if, because, if, since, though, unless, whenever can be examples of this.
has one independent clause and no subordinate clauses. It can have a compound subject and/or a compound verb.
What type of sentence? People who are learning a new sport begin by mastering basic skills, and they usually are very enthusiastic.
What type of sentence? After people have been practicing the basic skills for several weeks or months, they usually progress to more difficult moves.
What type of sentence? At this point a beginner may become discouraged, and the temptation to quit grows strong.
What type of sentence? If the student is not careful, the muscles can be injured, but the strenuous activity usually strengthens the muscles.
What type of sentence? The hours of practice that a beginner puts in often result in obvious improvements.
What type of sentence? Obviously, learning something new takes time and work, or it would not be worthwhile.