 A vast number of morphological changes in language can be attributed to a linguistic process known as analogy. In analogical restructuring, irregular patterns are invented to conform with regular patterns that already exist in the language. For example, in old English the following three forms have undergone analogical restructuring, so that today we only have two forms. Instances of analogical restructuring can also be found in the present-day English system of relative pronouns. Here we have two paradigms. In two of them, we have identity between the object and the subject form. However, in the personal paradigm there is a difference. Due to an analogical change, the form whom becomes who. Closely related to the process of analogy is the mechanism of reinterpretation. Reinterpretation primarily applies to changes in syntax. Note that analogy does not create new patterns, rather it modifies the already existing patterns in the language.