Final answer:
The student's sentences have been rewritten with appropriate capitalization and punctuation. Capitalize the first word of a sentence, proper nouns, proper adjectives, and use periods and question marks to appropriately end sentences.
Step-by-step explanation:
The sentences with correct capitalization and punctuation are:
Did you hear about the elephants outside?
They are coming to town for the fair.
Go over to the window to see them.
This year's fest will be the best ever.
How much do elephants eat each day?
When it comes to capital letters, always capitalize the first word of a sentence. Proper nouns and proper adjectives should also begin with capital letters. Punctuation marks, such as periods and question marks, should be placed at the end of each sentence accordingly. For a question, use a question mark, and for a statement, use a period.