The only classes of words that were still allowed to inflect irregularly were the pronouns, the relatives, the demonstrative adjectives and the auxiliary verbs. All of these followed their ancient usage, except that whom had been scrapped as unnecessary, and the shall, should tenses had been dropped, all their uses being covered by will and would . There were also certain irregularities in word-formation arising out of the need for rapid and easy speech. A word which was difficult to utter, or was liable to be incorrectly heard, was held to be ipso facto a bad word: occasionally therefore, for the sake of euphony, extra letters were inserted into a word or an archaic formation was retained. But this need made itself felt chiefly in connection with the B vocabulary. Why so great an importance was attached to ease of pronunciation will be made clear later in this essay.