okay thanks a lot for your help. I got to know that the use of "still". "Still" is use when something is going from past and at present also it is continue so that time we use "still" e.g I am still hungry. I am still using my bicycle. And "till" meaning is up to means for that point of time I will wait. e,g I will wait till 9:00 pm. so if something is wrong here please correct me. Thanks in adva