如果您的意思是说，某人不是您的老师，那么您可以这样表达：
"He is not my teacher."
如果您想问某人为什么能说英语，则可以这样问：
"Why can he speak Engpsh?"
或者：
"How come he can speak Engpsh?"
"He is not my teacher."
如果您想问某人为什么能说英语，则可以这样问：
"Why can he speak Engpsh?"
或者：
"How come he can speak Engpsh?"
复合函数求导的英文表达是 "differentiate a composite f05-31
如果您的意思是说，某人不是您的老师，那么您可以这样表达： "05-31
在中文中，可以用“更好地使用手机”来表达这个意思。 这05-31
In Engpsh, you can say "See you at 10pm tonight."05-31
In Engpsh, we would say "using chopsticks to serve ri05-31
在英语中，可以这样表达: "I just bought some groceries."05-31
月亮升起的声音英语翻译为 "the sound of the moon risin05-31
奶牛养殖场英语称为"dairy farm"。这个词来源于中世纪拉05-31