The Case of A Noun :
A nominative is the particular form of a noun which shows that the noun is the subject of a verb.
An accusative is the particular form of a noun which shows that the noun is the direct object of a verb.
A genitive is the particular form of a noun which shows that the noun is a possessor or an origin.
When a noun is used as the Subject of a verb, it is in the Nominative case.
When a noun is used as the object of a verb, it is in the Accusative (objective) case.
The test of nominative is the test of object. Put who / what before the verb and if the answer is the subject, it is in the nominative.
The test of the accusative is the test of object put whom / what after the verb and if the answer is the object it is in the accusative.
A noun which comes after a preposition is also in the accusative case.
The possessive case also denotes authorship, origin, kind etc.
(i) John studied English Grammar.
John - Proper noun - Subject of the verb studied
Who studied grammar?
English Grammar — Common Noun
Object of studied
What did John study?
(ii) She is Singh's wife.
Singh's - Proper noun
Singh s wife — Complement of 'is'
(iii) The Court's decree is that I should pay one thousand rupees.
Court's - Possessive case
(but here, it gives definite origin to the decree)
The Case of A Noun
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