По 5 предложений на английском языке на тему: Что учитель не должен делать( не "запрещается", а не должен)? Что учитель может делать? Заранее спасибо.

Teacher shouldn't yell at students. Teacher should involve its personal life into work. Teacher shouldn't like some students more than others. Teacher shouldn't dress inappropriate to school. Teacher shouldn't swear in school. Teacher can talk with students after lessons. Teacher can wear casual clothes to school. Teacher can ask students questions. Teacher can enjoy free time between lessons. Teacher can have friends in school.