Hello. You did not present the sentences that should be revised, which makes it impossible for your question to be answered, however, I will try to help you in the best possible way.
Your question shows that sentences should be revised by placing or removing punctuation and uppercase and lowercase letters.
In that case, you should start by knowing that capital letters must be the first letter of a sentence, a person's name, or a place name. Therefore, all sentences that start with a lowercase letter, or have names of people and places with the first letter, being a lowercase letter, you must change to a uppercase letter. The other letters must remain lowercase.
Regarding punctuation, you must use a period in every end of the affirmative sentence. At the end of interrogative phrases, which are asking a question, you must end with the question mark (?) And phrases that are making a request or an order, you must end with an exclamation mark (!).
Commas must always be placed before the words "but" and "however" and must always be placed after the word "Therefore."
Finally, the apostrophe (') should always be used in the expressions "don't," "isn't" and "can't", which are shortened forms of negative expressions. The apostrophe should also be used to show possessiveness, as in the phrase "This is Lia's dog."
