1) Recognize subordinate clauses that depend on a main clause,
2) Recognize introductory elements that require a comma, a prepositional phrase that modifies a subject in a main clause and needs to be set off with a comma, dependent markers or nonrestrictive modifiers, conjunctive adverbs requiring a comma to follow, and semi-colons to separate two independent clauses.
-Pay attention to the which clause as a nonrestrictive modifier.
-Can use use a period or a semi-colon in places.
Copernicus didn’t discover that the earth rotated around the sun much like Columbus didn't discover America however both of these men have become famous for these revolutionary discoveries in fact most academics agree that Copernicus’s discovery of the heliocentric theory laid the foundation for modern science and astronomy in particular our language however still clings to the outdated and false geocentric theory we talk about the sun rising and setting which presupposes that it’s the sun moving around the earth rather than vice versa in English’s defense though this is not the language of ignorance rather it’s the language of our daily experience.