I have found that with the changes to the curriculum, I am really having to polish up my grammar skills. I was hoping someone could explain the necessity for the word 'to' in a sentence, as the children in my class have a shocking habit of leaving it out. They will often say, 'Can I go toilet,' or, 'I went town'. I really want to explain why this is incorrect, but have found that I don't actually know the grammatical reason! Any help would be appreciated.