Begginning with a special opening word or phrase:
1: -ed word: Connected about his son's fever, Paul called a doctor.

2: -ing word: Humming softly, the woman browsed through the rack of dresses.

3:-ly word; Hesitantly, Winson approached the insructor's desk.

4:to word group: To protect her hair, Eva uses the lowest setting on her blow dryer.

5:Prepositional Phrase: During the exam, drops of water fell from the ceiling.


Adding A second complete thought:
When you add a second complete thought to a simple sentence, the result is a compound sentence, which gives equal weitht to two closely related ideas.

The two complete statements in a compound sentence are usually connected by a comma plus a joining or coordinating word(and, but, or, nor, so, yet)

ex:
Greg worked on the engine for three hourse, but the car still wouldn't start.