ph sounds f

Core Rule

ph = /f/ in modern English, mainly from Greek origins. The two letters function as one sound, not /p/ + /h/.

Articulation Guide

Upper teeth touch lower lip; steady airflow; no vocal cord vibration.

Word Analysis

In autobiography, bibliography, hemisphere, ph consistently signals /f/, common in academic vocabulary.

Pitfalls

Do not split ph across syllables or pronounce it as /p/.