Answer:
but last year I work hard enough for English that's why my marks be really that good then
Punctuation marks are hierarchically ordered, based on the degree of separation they provide for example, sentence-final marks periods exclamation marks and question marks provide maximum degree of separation whereas commas or no punctuation marks provide the minimum degree of separation. Colons, semicolons and dashes provide medium separation and have extra meaning anticipatory, logical connection and emphatic, respectively
To try to persuade someone to do something based on the fact that "everyone's
doing it"