The word only is very often misplaced in a sentence. Always put it just before the word that it refers to/modifies.
…I only have a dollar. 🙁
…I have only a dollar. 🙂
…She only listened to her brother. 🙁
…She listened to only her brother. 🙂
…He only knows where it is. 🙁
…Only he knows where it is. 🙂
…He only got one hit in the game. 🙁
…He got only one hit in the game. 🙂
And the list goes on and on.