When combining two complete sentences with a conjunction ("and," "but," "or," "for," or "yet"), precede the conjunction with a comma. Example: Still, the sun is slowly getting brighter and hotter, and ...

Actor George Takei, who played the helmsman of the USS Enterprise on "Star Trek," recently posted the above image that depicts a strange example of a perfectly logical English sentence. It contains ...

In order to make your writing clear, you need to use commas. As well as using them to separate out key information, or divide up different clauses, commas can also completely change the meaning of a ...