老师用英语写是teacher。
teacher作为名词是教师、导师，Teacher作为人名是指(英)蒂彻。
相关例句：The teacher told us to be careful when we cross the road这位老师叮嘱过我们过马路要注意安全。
相关例句：Our teacher took us to sweep the cemetery of the martyrs我们老师带着我们去祭扫了烈士陵园。