How to Write Clearly. Rules and Exercises on English Compostion
*15. Emphatic words must stand in emphatic positions; i.e. for the most part, at the beginning or at the end of the sentence.* This rule occasionally supersedes the common rules about position. Thus, the place for an adverb, as a rule, should be between the subject and verb: "He quickly left the room;" but if quickly is to be emphatic, it must come at the beginning or end, as in "I told him to leave the room slowly, but he left quickly.".