Common digraphs:
* ai: train, rain, paint, sail
* ay: play, say, stay, way
* ey: they, prey, obey, convey
* ei: neighbor, weigh, sleigh, reign
Less common digraphs:
* ea: great, break, steak, (Sometimes "ea" makes other sounds like "e" in "bread" or "short e" in "head")
* ie: field, shield, chief, (Sometimes "ie" makes the long e sound like "believe")
Important note: The long a sound isn't always spelled the same way. Sometimes it is simply a single "a" like in "fate" or "bake".