now the tricky thing about background knowledge is some of us have a lot and some of us have a lot less depending on how old we are or sometimes how much we read and again i think that i have sentenced before the more you read the more background knowledge you got so that is background knowledge and the last grammar and punctuation clue that we are gonna talk about is on page 89 and 90 and its grammar and punctuation and this is actually my favorite one i don't know why .