Diagraphs
A diagraph consists of two consonants that form a new sound when combined.
sh
She, shop, shoes, wash, dish, fish
ch
chicken, check, lunch, peach,
ph
photo, graph, telephone, elephant
th (voiceless)
Thick, thin, think, three, bath, month
TH
(voiced)This, that, other, mother, father
wh
What, when, where, why, who
kn
Know, knee, knife,
tch
(silent t)
Catch, pitch, itch, watch, match