1.允许某人做某事allow sb to do sth例如:The teachers allow us to have a rest every fifty minutes.老师允许我们每五十分钟休息一会儿.My mother allows me to watch TV after finishing the homework.妈妈允许我完成作业后看电视.2.某人被允许做某事sb be allowed to do sth例如:We are allowed to have a rest by teachers.I am allowed to watch TV after finishing the homework by my mom.