Modal auxiliaries Vs Primary auxiliaries Primary auxiliaries are be, do, have. They are used to form tenses and to frame short answers. Modal auxiliaries are will, would, may, might, shall, should, can, could, must, dare, need, used, ought. They are used to express moods.
(1.Nominative, 2.Objective or Accusative, 3.Possessive or Genitive, 4.Vocative or Nominative of Address, 5.Dative)
The Case of a noun can be classified into FIVE.
1. Nominative Case
A noun or a pronoun, when it is used as the SUBJECT OF A VERB, it is said to be in the Nominative Case.
He bought a book
In the given example ‘He’ is the subject. It is the answer to the question who bought the book? “Bought the book?” is the Predicate and it contains the Verb ‘Bought’. So the noun ‘He’ is said to be in the Nominative Case.
Jems was a Singer
Stars shine at night
Platinum is very precious
The army advanced
Note :To find the Nominative Case ask the question WHO or WHAT to the verb
2. Objective or Accusative Case
A noun or a pronoun, when it is used as the OBJECT OF A VERB, it is said to be in the OBJECTIVE CASE.
John killed a dog.
In the given example ‘A dog’ is teh answer to the question ‘What did John kill’? Therefore the noun ‘dog’ is called the OBJECT and it is said in the Objective Case.
Jems broke the door
He saw teh crowd
We went to London
Dhoni sold all his Gold
Note : To find the Objective or Accusative Case put WHOM or WHAT before the verb and its object.
3. Prossessive or Genitive Case
A noun or a pronoun, when it is used to show owenership or possession, authority, origin, kind etc.,
It is said to be in the Possessive or Genitive Case.
This is John’s bike.
When the noun is Singular, the Possessive Case is formed by adding ‘S’ (apostrophe S) to the noun and when it is ‘S’ ending Plural by adding an apostrophe after the ‘S’ (S’)
4. Vocative Case or Nominative Case
When the noun is the name of a person SPOKEN TO or ADDRESSED, it is said to be in the Vocative case or we call its case, the Nominative of address
Sit down, Peter
Note : Here Peter is addressed.
When a noun indicates the indirect object of the verb - generally, ‘GIVE’ it is said to be in the Dative Case.
David gave Mirza a pen
In the above sentence David was the person to whom Mirza gave a pen. The Indirect object of a verb denotes the person to whome something is given or for whom something is done.