I am a word that joins words, phrases, and clauses.

After Prince Charming put the glass slipper on her foot, Cinderella went to the palace and lived

Hank the Cowdog chased Pete the Barncat into Sally Mae's iris patch, and she was mad!

After school on Thursday, I threw snowballs at three funny boys.

Although he was very intelligent, Mario could not figure out how to solve the Rubik's Cube.