What is a bad way to start a sentence

A wrong way to start a sentence is with the word "and" or "but." Also, try and refrain from using the word " I" too many times

A bad way to start a sentence is with the word because.

Explanation:

Example:

Bad sentence: Because the cap was left off the pen, it dried out.

Good sentence: The pen dried out because the cap was left off the pen.