Analysis of Bach's fugues: key changes

[Bach>Meer]

Dear all

At the risk of being a bore can I possibly ask what kind of key changes would typically exist (and all they better if you can tell me which ones actually do exist) say in a Bach fugue for example in C Major. Which keys does he generally tend to shift into.

This is just to aid my understanding as I begin to attempt to play some of the pieces.

Thanks!

[kierantk]

Sorry to say this, but most of bach's fugues don't follow a set key progression. The only real keys you can expect are the obvious - dominant, sub-dominant and relative minor, but he often does move into other keys