One of the difficulties encountered by a person in comprehending Gita's language is that the natural order of the sentence is not very clear if one is not totally conversant with Sanskrit. This
http://geetaanvay.blogspot.co.uk/ is a great site for clarifying what the shloka is saying as it rearranges the words in natural order. The site is a great help to person coming to grips with Sanskrit via Gita. This site
http://study1geetaa2sanskrit.wordpress.com/ also aids the learning by giving a detailed linguistic analysis of shlokas.