When adding suffixes like '-able' to words ending in silent 'e', most words keep the 'e' (changeable, lovable, likeable). 'Hopeing' drops the 'e' before '-ing' (hoping), 'argueable' drops the 'e' before '-able' (arguable), and 'haveing' drops the 'e' before '-ing' (having). Only 'changeable' correctly keeps the 'e' before the suffix.