Adding a comma can change the meaning of a sentence. Let's eat Albert. = We're going to eat Albert. Let's eat, Albert. = We're eating with Albert. In a long sentence, you can use commas to ...

Precede transition words like "however" and "therefore" when they combine two complete sentences. These transition words will need to be followed by a comma. Example: I would like to double-major in ...

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 ...

If the introduction to a quote is a full sentence, then a colon can be used. Choosing a colon instead of a comma creates a longer pause and puts more emphasis on the quote. When alone in a room, ...