A dependent clause cannot stand alone, though they often contain both a subject and a verb. Where independent clauses express complete thoughts, dependent clauses do not, and left on their own, ...

A complex sentence communicates more than one idea. One part (the main clause) is like a simple sentence: it can stand on its own. The other part (the minor clause) gives more detail about the simple ...

This makes the two ideas equal in the sentence - if you take away one part of it, you are left with a simple sentence again. These are very common when speaking and they are not difficult to ...