A digraph is two letters that combine together to correspond to one sound (phoneme). … Examples of vowel digraphs are ‘ea, oa, oe, ie, ue, ar, er, ir, or, ur ‘.

Is OA a diphthong or digraph?

In the English language, a digraph can be understood as a pair of letters which stand for a single phoneme (A phoneme is the smallest unit of sound in a language). There are both consonant digraphs and also vowel digraphs as well. Some of the most used vowel digraphs are ai, ay, ea, ee, ei, ey, ie, oa, oo, ow and ue.

Is OA diphthong?

/əʊ/ This diphthong uses letters and letter combinations like /ow/, /oa/ and /o/ to form sounds similar to “boat.” Here are a few more examples: Go. Oh.