1. It's a very boring novel. I am reading (Present Continious) it for two or three weeks, though usually I read (Present Simple) books very quikly.

2. - Have you discussed (present perfect) the plans yet?

-no yet. we are discussing (present continious) them since ten o'clockand I think we will finish (future simple) only in hour.

3. Have you ever lived (present perfect) in Kaluga? I think I met (past simple) you there.

No, i am living (present continious)  in St. Pet. since I was born (past simple) but i was (past simple) in Kaluga some years ago.