If you want to practise grammar try the following links. There you can choose your topic and usually you’ll get some information and very often can practise online.

Or choose one of the following pages if you know what you still need to practise.

http://www.ego4u.de/ (highly recommended!)

http://www.english-zone.com/grammar/index.html

http://owl.english.purdue.edu/handouts/grammar/index.html

http://www.englishgrammarconnection.com/lessonstart.html

http://www.ucl.ac.uk/internet-grammar/

http://www.englishpage.com/

http://www.englishlearner.com/

http://userpages.umbc.edu/~kpokoy1/grammar1.htm

http://www.ccc.commnet.edu/grammar/

http://grammar.englishclub.com/

http://www.englishgrammarconnection.com/

http://www.bnv-bamberg.de/home/ulrich.koch/flg/englischinteraktiv/