Capitalize the first word of every sentence. The capitalized word tells the reader that a new sentence is beginning.
Today is Thursday. Tomorrow will be Friday.
The pronoun I is always capitalized. The word I is a name for yourself. You are an important person, so you should always capitalize the name for yourself – I.
I have a test tomorrow. I hope I can figure out those math problems.
Remember to capitalize the first word of every sentence. Capitalize the pronoun I every time it is used.