Innit?

Many years ago I wrote an English Grammar for foreign learners. It made me a few bob and did nothing to harm my reputation as a chap who knew a bit. But after listening recently to a discussion programme on BBC Radio 4 in which the great British public was invited to take part, I don't know why I bothered. There seems little mileage in having Johnny Foreigner speaking our language more correctly that we do ourselves. I am also dismayed by the inarticulacy of so many adolescents these days. Their speech is like you know really like bad, dyknowhatImean?, never mind like the bad grammar, innit?