### Theory:

Determiners are the words that introduce a noun and provide some information about it (but do not describe it). Determiners are followed by a noun.
Example:
• The book
• Five dogs
• His son
• Some students

Types of Determiners

Determiners frequently use articles. 'a,' 'an,' and 'the'. The articles 'a' and 'an' are called indefinite articles, 'the' is called definite articles.

Indefinite Articles (a, an): When we are talking about general things, we need to use indefinite articles. An article "a" is used before words that starts with consonants sounds, while ‘an’ is used before words starting with vowel sounds (a, e, i, o, u).

Example:
1. An orange would be eaten.
2. It is an interesting story.
Definite Article (the): When we are talking about the specific thing we need to use definite article.
Example:
1. The capital of United States is Washington.
2. The sun is very hot.
Demonstrative determiner: A demonstrative determiner tells us about the position of something. 'This’, ‘that’, ‘these’, ‘those’ are the demonstrative determiners.
Example:
1. I want this piece of chicken.
2. This movie is boring.

Quantifier: A quantifier is used before noun to tell us the quantity and degree of the object.

Example:
1. She liked all books equally.
2. He played a lot of sport.
Numbers are used to represent the quantity. Numbers are a kind of determiners. They are placed
before noun. Numbers can be cardinals and ordinals.

Cardinal: A number like 1, 2, 3 that represents amount, rather than position in a list.

Example:
1. She ordered one cake.
2. She has four brothers.
3. I have ten dollars.
Ordinal: A number such as 1st, 2nd, 3rd, 4th, that shows the position of something in a list of things. It is May 23rd.
Example:
1. She took 1st position in her examination.
2. Ram won 2nd position in javelin throw.
Possessive determiner: Possessive determiners are used to show ownership. They also represent the possession of someone, something, or place. Most of the words are also used as pronoun.
Example:
1. Any looks like her mother.
2. Alice is my best friend.
3. Our party was delayed.
4. Where is your pen?
Some of the determiners of the lesson "A Birthday Letter":

 S.No Sentence Determiners 1 My presents cannot be very material or solid My- Possessive determiner 2 Do you remember how fascinated you were when you first read the story of Joan of Arc, and how your ambition was to be something like her? You- Possessive determiner, first- Ordinal number 3 One little test I shall ask you to apply whenever you are in doubt. One - Cardinal number 4 A letter can hardly take the place of a talk. A- Indefinite Article