What is a Digraph? A digraph is two consonants that come together to make ONE sound. For example, think about the sh in the word sheep. You can hear that sh makes one sound /sh/. There are common digraphs like ch, sh, th, and wh. There are less common digraphs like wr, kn, gn, gh, and ph.
A digraph is a group of two successive letters that represents a single sound, or phoneme, which can be difficult for English learners to absorb.