如果只是写英文地址，前面不加介词 eg. No. 13 street, Paris, France. 如果是在什么路什么街上，要用介词on(美式用法）或者in (英式用法），但是如果说了具体的几号，就要用at. eg. There is a bank on Center Street. The Sawyers lived at 87 King Street.