No, it cannot be a preposition, which is a linking word (of, in, at, to). Brother is a noun and little is an adjective, creating a noun phrase for a younger male sibling.
The preposition "without" can be the opposite of "with" as in the examples: He went with his brother/He went without his brother.
The word "to" is definitely a preposition-- she is going to the football game tomorrow. The word "with" is also a preposition-- he is studying with his cousin and his brother. But the word "as" is more complicated; depending on how it is used, it can be a conjunction, an adverb, or a preposition. To use it as a preposition: As a teenager, John hated school.
The little brother is Doodle.
'little brother' = hermanito
Abel was this first little brother. His brother's name was Cain.
A preposition is one of those little words that you use to start off a phrase, like to, for, by, when, before and so on.
he has a little brother? since when...
"Little brother" in Welsh is "brawd bach."
The duration of The Little Brother is 3000.0 seconds.
sango's little brother is named kokaku
Sometimes a little brother can be smarter than a big brother.
The preposition in this sentence is the word "at". As this word helps show and focus the sentence to the main subject, or point in the sentence, it is the only preposition.