及物動詞bring後面必須有賓語，它還可以後跟直接賓語和間接賓語，即bring sb sth, 或者bring sth to sb。 妳所給的例句中的(bring )in是副詞，不是介詞。in可以作介詞和副詞。例如：
They are in the room. (介詞)
He works in the shop. (介詞)
He is in. (副詞)
She is getting in the wheat. (副詞)
同樣，動詞短語bring up 、bring out、bring down、bring back中的up、out、down、back也都是副詞。