If doubtful about ie or ei, in the event the seem of the vowel is as In short /i:/, we spell it ie; but following the letter c, we spell it ei: Enhanced Infrastructure: DSL companies are buying infrastructure upgrades, like changing copper strains with fiber-optic cables to the "very https://spelling-mistakes-by-dsl95284.smblogsites.com/26820407/top-guidelines-of-spelling-rules-in-english-grammar