✔ 最佳答案
If you practice hard,i.e. 6 -8 hours everyday, you can get faster progress.
If you won't practice, it's hard to pass any of the above grade.
The most important thing is to follow the instructions of your piano teacher and to put some more interests in your piano playing.
There's no absolute answer to pass the grade 8 in how many years. However one year one grade in progress would be the most general thing that many students can do. That's no matter what age he/she is.
My total practicing hours in passing grade 8 would be around 2,000 - 3,000 hours.
The practicing time for the famous pianists like Long Long , Yundi Li would be very very much much longer than me.
參考: Teaching and learning experience in piano