Nisab us sarf book is exclusively for students who are doing Dars Nizami, ie (Aalim Aalima) course. This book is taught in the first year of Dars Nizami which is called Arabic Grammar Course. On the basis of which you can translate Arabic verses and hadiths and verses into Urdu. The grammar is taught and explained in a very simple way in the textbook so that it is easy for the student to understand. If you are having difficulty understanding the book then you can enroll in online course and take Arabic grammar course which you will learn very easily.