While answering any questions in the grammar and sentence correction, it is very important to keep in mind the English grammar rules.
Rules of verbs: Identify the grammatical number of the nouns (singular, plural, etc) and ensure that the verb usage is accurate.
'None' and 'Everyone' are singular nouns. For example, 'None of the students is guilty.' Nouns which denote a collective group are singular. For example, 'A team of five is going to party tonight.' Tense of the verbs: Ensure that the tenses of the verbs in all parts of the sentence are consistent
Connectivity of verbs: When a group of verbs is connected to a noun in the same sentence, the tense of the verbs should be consistent. For example, 'My kid brother cries, eats and sleeps all day long' is correct and it should not be, 'My kid brother cries, eats and is sleeping all day long.'