When and where do use capital letters?

Generally, we write each letter of the English alphabet as a small letter (abc...) or as a large or capital letter (ABC...). However, we cannot letters always in same manner. It is not good and right to write whole sentences in capitals. A sentence or paragraph written in capitals is very difficult to read.

When do we Use Capital Letters?

1. We use the first letter of the spelling a capital letter for the personal pronoun 'I':

What can I do?

2. We use the first letter of the spelling a capital letter to begin a sentence or to begin speech:

The man arrived. He sat down.

Suddenly Mary asked, "Do you love me?"

3. We use the first letter of the spelling a capital letters for many abbreviations and acronyms:

G.M.T. or GMT (Greenwich Mean Time)

N.A.T.O. or NATO  (North Atlantic Treaty Organization)

M.A. Master of Arts

4. We use the first letter of the spelling a capital letter for the names of days of the week, months of the year, holidays:

Monday

January

Diwali

5. We use the first letter of the spelling a capital letter for names of countries, languages & nationalities, religions:

India, Pakistan

Japanese, English

Hinduism, Buddhism

6. We use the first letter of the spelling a capital letter for people's names and titles:

Ram, William Shakespeare

Professor Jones, Dr Smith

Captain Kirk, King Henry VIII

7. We use the first letter of the spelling a capital letter for trademarks and names of companies and other organizations:

Amazon , Apple

Microsoft Corporation, Toyota

the United Nations, the Red Cross

8. We use the first letter of the spelling capital letter for places and monuments:

London, Paris, the Latin Quarter

the Eiffel Tower, St Paul's Cathedral

Buckingham Palace, the White House

Oxford Street, Fifth Avenue

Jupiter, Mars, Sirius

Asia, the Middle East, the North Pole

9. We use the first letter of the spelling for names of vehicles like ships, trains and spacecraft:

The Titanic

The Orient Express, the Flying Scotsman

10. We use the first letter of the spelling for titles of books, poems, songs, plays, films etc: If it contains more than one word, use the first letter capital in each of the words.

War And Peace

If, Futility

Like a Virgin

The Taming of the Shrew

The Lion King, Gone With The Wind

11. We use capital letters (sometimes!) for headings, titles of articles, books etc, and newspaper headlines:

WINGS OF FIRE

Chapter 2:  WATER