给你一个在线德语学习网站,有些基础语法,不知道跟你要的标准语法有多大区别?不过是免费的就是了,相信你的英语也是不错的吧?

http://www.bbc.co.uk/languages/german/lj/

These interactive tips are integrated into German Steps and explain the basic workings of the language. They are not a complete guide to German grammar, but provide a grounding in most of the main points. Each of them links to extra notes explaining structures and patterns in more detail.

参考资料：bbc web site