I was going through my threads and found this from ages ago. It was posted in a group SF, so I thought I'd drag it out for everyone to see. I don't profess to have perfect (or even good) grammar, but these are some oddball grammatical niches that everyone forgets about. 'That' vs. 'Which' [color=#32CD32]'I have a bike, which is red.' [color=#FF0000]'I have a bike, that is red.' [color=#32CD32]'There's a colour that I like, but I forget what it's called.' [color=#FF0000]'There's a colour which I like, but I forget what it's called.' This one is simple! One can only use 'which' after a comma, unless the sentence requires it in some other form, obviously (for instance, 'Which one do you prefer?'). The Oxford Comma [color=#32CD32]'You can get the bike in red and gold, blue and teal, and yellow and black.' This isn't always strictly necessary, but it looks good and can improve clarity of a list. Essentially, the Oxford Comma is a comma placed before an 'and' in the last item of a list, as a
