Defining several terms e.g.the plural marker:books,pigs,horses; the verb ending -ed:marked,radioed, seated; the negative prefixes:in-,un-,im-,ir-,il-, dis-,non-,a-.Defining several terms e.g. the plural marker: books, pigs, horses; the verb ending –ed: marked, radioed, seated; the negative prefixes: in-, un-, im-, ir-, il-, dis-, non-, a-