这个绝对实用吧，毕竟每个女生都喜欢化完妆美美的样子，所以，化妆镜是必需品。 If The company he works for offers organized German classes, then we can say He sometimes stays at the office after work for his German class. After the class he goes home. It is not idiomatic "to give" a class. A class, hinein this sense, is a collective noun https://youtu.be/T0zWXvhEQwo?si=wNc6ihu97ShtIl7u