Correct spelling is not only about which letters we use in the word. We should also know when to begin a word with a capital letter. (This is called capitalisation.)
Here are some examples of when we should and should not use capital letters in English.
Use a capital letter for the first letter of the first word of a letter or email:
Dear Mr Smith
Thank you for your email and the information.
When you begin a new sentence:
We need the goods as soon as possible. Could you please send them tomorrow?
For days of the week and for months:
Monday, Tuesday, etc.
January, February, etc.
When beginning a quotation:
The chairman replied, “We plan to make further changes.”
For names of companies:
Speakspeak International Limited; British Rail.
For the first letter of a proper noun, i.e. someone’s name:
John Logie Baird invented the television.
Marcel is a French teacher.
For names of countries and the first letter of adjectives derived from country names, languages, etc.:
Finland, the Czech Republic. It’s a French company. He’s French.
For many abbreviations and acronyms:
VAT (Value Added Tax); VIP (Very Important Person).
We don’t use capital letters in these cases:
For the names of the seasons:
spring, summer, autumn, winter.
for the following common abbreviations:
m (abbreviation for million)
bn (abbreviation for billion)
plc (a public limited company).
I’ve given 10 rules. There are others, of course. Feel free to add to the list by leaving a comment below.