Table 12

Classes 1 and 3 were the most numerous of all: about 60 and 80 verbs, respectively; within Class 3 the first group – with a nasal or nasal plus a plosive in the root (findan, rinnan – NE run) included almost 40 verbs, which was about as much as the number of verbs in Class 2; the rest of the classes had from 10 to 15 verbs each. In view of the subsequent interinfluence and mixture of classes it is also noteworthy that some classes in OE had similar forms; thus Classes 4 and 5 differed in one form only – the steins of Participle II; Classes 2, 3b and c and Class 4 had identical vowels in the stem of Participle II.

The history of the strong verbs traced back through Early OE to PG will reveal the origins of the sound interchanges and of the division into classes; it will also show some features which may help to identify the classes.

The gradation series used in Class 1 through 5 go back to the PIE qualitative ablaut [e~o] and some instances of quantitative ablaut. The grades [e~o] reflected in Germanic as [e/i~a] were used in the first and second stems; they represented the normal grade (a short vowel) and were contrasted to the zero-grade (loss of the grada­tion vowel) or to the prolonged grade (a long vowel) in the third and fourth stem. The original gradation series split into several series because the gradation vowel was inserted in the root and was combined there with the sounds of the root. Together with them, it was then subjected to regular phonetic changes. Each class of verbs offered a peculiar pho­netic environment for the gradation vowels and accordingly transformed the original series into a new gradation series.

Table 13 shows the development of the OE vowel gradation from the IE ablaut [e~o] which accounts for the first five classes of strong verbs. In Classes 1 and 2 the root of the verb originally contained [i] and [u] (hence the names i -class and u -class); combination of the grada­tion vowels with these sounds produced long vowels and diphthongs in the first and second stems. Classes 3, 4 and 5 had no vowels, consequently the first and second forms contain the gradation vowels descending directly from the short [e] and [ο]; Class 3 split into subclasses as some of the vowels could be diphthongised under the Early OE breaking. In the third and fourth stems we find the zero-grade or the prolonged grade of ablaut; therefore Class 1 – i- class – has [i], Class 2 – [u] or [o]; in Classes 4 and 5 the Past pl stem has a long vowel [æ]. Class 5 (b) contained [j] following the root in the Inf.; hence the mutated vowel [i] and the lengthening of the consonant: sittan.

In the verbs of Class 6 the original IE gradation was purely quan­titative; in PG it was transformed into a quantitative-qualitative series.

Class 7 had acquired its vowel interchange from a different source: originally this was a class of reduplicating verbs, which built their past tense by repeating the root. Reduplication can be illustrated by Gothic verbs, e.g. maitan – maimait – maimaitum – maitans ('chop'). In OE the roots in the Past tense stems had been contracted and appeared as a single morpheme with a long vowel. The vowels were different with different verbs, as they resulted from the fusion of various root-morphemes, so that Class 7 had no single series of vowel interchanges.

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