I am a (big)fan of Lin Dan.我是林丹的（超级）粉丝儿.现在一般这么说的比较多o(∩_∩)o
I usually do my homework with my friend's help.usually—经常,always—总是,个人感觉这里用经常恰当一些,总是的频率貌似有点高吧.