I'm 

  'I'm' is an abbreviation for the word 'I AM.' It is used in combination with other words to tell someone about yourself or to describe something you are doing.

 Here are some examples:

"I'm so tired."
"I'm confused."
"I'm happy."
"I'm twenty three years old."
"I'm hungry."
"I'm nervous."
"I'm excited."
"I'm leaving work."
"I'm thirsty."
"I'm from Seattle."

You can also add descriptive words with 'I'm' such as:

"I'm extremely tired."
"I'm very happy."
"I'm terribly hungry."
"I am super excited."
"I'm very nervous."