In school, I was taught about conjunctions (e.g. or and and) and the role they play in sentence structure – they are linking words. They do what they say on the tin: con-(i.e. with) and -junction (i.e ...
It’s just a comma, my friend complained to me last week while I was editing her essay. I had told her, politely but firmly, that one of her sentences was incorrect without a comma; she did not take it ...