學琴的人彈幾耐練習曲?

基本上學幾耐就要keep住練幾耐,
因為愈彈得高級就會發覺佢愈有用架,
我學到diploma(演奏級)都仲彈緊呢d練習~

印象中你所列既每本都至少彈半年,
其中czerny愈高級愈厚愈難,可能要彈一年多先彈得哂,
我就通常一個禮拜學一首,我諗彈哂成本都隨時要成年架~

You only use these Studies at the beginner/intermediate levels, and even then, you don't really need too much of it. You don't have to devote too much time on each of these volumes, just pick some and practice them.
And once you reached a more advanced level (probably Diploma or after) you don't really need these anymore. I am rather against using Czerny, Cramer, Hanon, etc., because these Studies present little or no musical value. I would rather you practice all three sets of Chopin Etudes (Opp. 10, 25, and 3 early ones), Liszt Etudes, or all the way down to the Kapustin Etudes, than playing Czerny. Too much Czerny, Cramer, Hanon, etc. will make you a robotic musician - you will play everything as if you are playing Exercise pieces. So, play some, but not too much.