There are many ways to write a comic. Many comics use a mixture of the methods described below.

No words:
One way is to avoid writing at all. Some comics (such as those created by Sergio Aragones for "Mad Magazine") tell a story with images only. This may seem like an easy way to avoid work, but telling a complex story without words is a lot more difficult than you may think. Even in a story with a lot of text, sometimes a few panels or even an entire page without words can give the necessary mood or emphasis to a pivotal point in the story.

Dialogue:
This style of writing is similar to listening to a conversation. The reader is given crucial information about the story from what the characters say. Usually speech bubbles or balloons depict the dialogue. There is also internal dialogue, which is what the character is thinking. Internal dialogue is usually depicted by a cloud over the characters head. It's important to make it clear to the reader what is being said out loud and what is a private thought. Also important is making sure to distinguish which character is saying what.

Captions:
Captions are an option used in one panel comics as a punch line or explanation for the image. Captions are also used to set the date or place of the story, show how much time has passed between panels (such as "the next day") or to show events happening simultaneously ("meanwhile").

Narrative:
A narrative story is often written in the first-person point of view. The narrator is recounting an event that happened to him or her. The text is usually in caption form. Narrative stories can also be written in second or third-person and be about an historical or fictitious event.