While correcting the person grammar mistakes, please explain why it is wrong. For example; jake is a specific/proper noun. A proper noun is a specific place, person or thing. For example; Walmart (instead of the grocery store). All proper nouns must have a capital letter, Jake is a proper noun cause it refers to a specific person, not just 'boy' or 'girl'. So the word jake must have a capital letter when used no matter what.