... possibly due to the weak correspondence between sounds and letters in the spelling of modern English, written syllabification in English is based mostly on etymological or morphological instead of phonetic principles
. ... As a result, even most native English speakers are unable to syllabify words accurately without consulting a dictionary or using a word processor. ...The process is, in fact, so complicated that even schools usually do not provide much more advice on the topic than to consult a dictionary. In addition, there are differences between British and US syllabification and even between dictionaries of the same English variety.