Why put extra words in?
For example, "El perro esta debajo de la camisa". Is the sentence not the same with or without the "de"?
"The dog is under the shirt"
5 Answers
Because 'debajo de' is a preposition that means 'beneath', or 'under', or 'below'.
The entire prepositional phrase is 'debajo de la camisa'... 'beneath the shirt', or 'under the shirt'.
Becasue that's the way languages work.
For instance, in my first job in the US I was told "Clean up the kitchen", so I looked UP thinking I had to clean the ceiling. 
Oh... and your sentence says... "The dog this under the shirt". 
esta = this (feminine thing)
Remember to use está (with the accent over the a) for he/she/it is.
You could also say "El perro está bajo la camisa" without debajo at all.
Welcome aboard!
Well, I could also say "Why put fewer words in?" Shouldn't it be this or that way? Of course, we would do that if we took Spanish as being the language from which all others are taking their cues, like you are doing with English. That's just not the way it works. A particular language might use only two words to say what would take another language 7 words. Sorry, amigo. Just the facts.
