This series of four volumes explains the use of Panini's Sanskrit grammar to the present-day student in simple English with examples that are easily understood. This fourth volume includes the entire Ashtaadhyaayi Sutrapaath and explains the following: aardhadhatuka affixes; the augment it; conjugations for the simple future - lrut; the periphrastic future - lut; the conditional - lrung; the benedictive - aashirlinga; the perfect - lit and the aorist - lung; the desiderative - sannant bases; the frequentative yangnt and yanglugant bases; Compounds - avyayobhav; tatpurush including karmadharaya, dwigu and upapad compounds; bahuvrihi; dwandwa; kruta affixes - pwula, trucha etc.; nishtha - the past participles; khalartha affixes; krutya - the potential participles; kruta affixes making the base indeclinable; the indeclinable past participles ktwa and lyup; the infinitives tumun, nmul etc.; feminine bases; abstract nouns formed with krut and tadhhita affixes; tadhhita affixes.