Why is it that while most the grammatical rules of English have deteriorated so much over the past few centuries when compared to other European languages? For example, English used to respect the t-v distinction (having thou/thee and ye/you). The subjective and objective cases almost seem to be merged when hardly anyone uses the word "whom" any more (except in very formal communication). To give a more extreme example, my school French teacher was teaching us the subjunctive mood in class last year and started off by claiming that the subjunctive "doesn't exist in English"! Of course it does, but so few people ever use it any more that even this well-educated linguist didn't realise it. There are countless other examples of how English grammar has decayed that are too trivial to list here. When I read French written at the time of Shakespeare it is in some cases only slightly more difficult to understand than English written at this time, such is the extent to which English has changed over the years. Even though all languages evolve over time, is there any reason why English should change so much compared to other languages?