The Subject Is (You)
This may sound strange, but every single command has the same subject! Yikes! How is that even possible?
since commands are always speaking to someone or something (you've got
to address them if you're going to ask them to do something), the
subject is always the word you.
You may have noticed that the word "you" is not even in a command. Because of this, the subject is actually called you understood, and it is written like this: (you)
This means that the subject is the word you, but since you is not written or spoken in the sentence, it is simply understood and is written in parentheses.
|Please find my yellow leotard.||(you)
|Shut the door!||(you)
|Be there at 5:00.||(you)
When a command begins with a noun of direct address, you might get tricked into thinking that it is a declarative sentence.
Bob, shut the door!
Grandma, be there at 5:00.
But, don't get tricked! These sentences are still commands and their subjects are still (you). Learn more about nouns of direct address beginning commands here.