Summary of findings

The most striking result of this investigation is the fact that processes predicted by universal morphological naturalness (Mayerthaler) play only a minor role. If anything, universal natural morphology predicts in the realm of the verb a continuous shift of strong verbs into the weak verb class (‘weakification’). However, the investigation in Chapter 4 has shown that while weakification does take place, it is by no means frequent and, in the majority of cases, can be explained by the retention of historically attested forms. Weakification, contrary to Mayerthaler's predictions, thus constitutes only a minor strategy. In the comparison with more modern data especially (e.g. from COLT, representing London teenage speech in the 1990s), we can see that strong verbs are remarkably resilient and resist the trend towards weakification on a grand scale.