Old English give certain evidence of an influence on syntax. The change to Old English from Old Norse was substantive, pervasive, and of a democratic character. Old Norse and Old English resembled each other closely like cousins and with some words in common, they roughly understood each other; in time the inflections melted away and the analytic pattern emerged. It is most "important to recognize that in many words the English and Scandinavian language differed chiefly in their inflectional elements. The body of the word was so nearly the same in the two languages that only the endings would put obstacles in
Old English grammar and its imperative and participle forms from "bēon". (Modern German had an analogous, but even more complicated, development for its verb "sein".) In late OE and ME, the form "earon"/"earun", from the Old Norse "erun", replaced bēoþ and sind (See also List of English words of Old Norse origin). Old English is an inflected language, and as such its nouns, pronouns, adjectives and determiners must be declined in order to serve a grammatical function. A set of declined forms of the same word pattern is called a declension. As in several other ancient Germanic languages, there are five major cases: