My sons are of the generation that wasn't taught grammar. Both of them speak perfectly grammatical English - as appropriate to the context, of course. However, when DS2 decided to take up Spanish again at University, he phoned me in some confusion because he had never been taught formal grammar at school. He didn't understand the grammatical terms being used by his lecturers. I sent him a copy of a grammar module I had created for my Access students who had the same problem. This year, my 11-year-old GD had to take a grammar and punctuation paper as part of her Key Stage 2 Sats.