i am confused about using the "ch" as there are three sound starting with "ch" as-/k/sound, and like these. is there some important rules to find out word formation?.someone please help me.
In English, orthography (spelling) is determined by etymology (the origin of the word) rather than phonology (the pronunciation), though there are limits to which sounds a spelling can represent. For instance, in most words that come from Latin or Greek, but not via French, words spelled with a ch a pronounced by Americans with a hard k sound. But this can be very complicated - the same word, schedule, is pronounced differently by Americans and British English speakers.