Proper Nouns

Proper nouns are usually not used with articles. For example: I live in Delhi, He works at Google. However, exceptions apply in cases when the article is a part of the name.

For instance:

The University of Delhi has many colleges affiliated to it.

 The Times of India is a prominent English-language newspaper in India.

Proper adjectives are adjectives derived from a proper noun and describes a noun by relating it to a specific person, place or thing.

Example:

I love American culture. (derived from America)

She enjoys Indian cuisine. (derived from India)

Yes, certain proper nouns are plural like the Himalayas, the Ahujas. In these cases, no apostrophe is used.

Example:

The Smiths moved in our block yesterday. (Family or Dynasty names)

The Lord of the Rings books are a good read. (Series Titles)

This song is sung by the Beatles. (Musical/Performance group)

No, seasons are not capitalized because they are common nouns.

For example: I love spring because of the flowers.

My exams are in winters.

However, in some cases, the seasons can be capitalized only if they a part of a formal name.

Example:

“Summer of '69'” is her favourite song.

I participated in Spring Festival Committee.

Proper nouns refer to some specific or unique person, place, animal, object or idea like Paris, PM Modi, etc. while common nouns are used generally like dog, city, etc. Some example of proper and common nouns are given below:

Proper noun –

Mr. Ravi is my Hindi teacher.

Her favourite holiday was in China.

Common noun –

The dog is going for a walk in the city.

I love eating an ice-cream in the evening.