Englishfor English speakers
I
Pronoun
—
The person who is speaking or writing
I am writing this, and you are reading it.
I
Noun
—
The ninth letter or the alphabet; previous H, next J. I is a vowel.
I
Symbol
—
A symbol meaning first, as in "George I" (which is said as "George the first").
—
The symbol for iodine on the periodic table of elements.
—
The symbol for electrical current.
I
Number
—
This is the roman numeral for one (1). It may be written as I or i.
i
Noun
—
The ninth letter or the alphabet; previous H, next J. I is a vowel.
didn't
verb
—
did not (negative auxiliary)
know
Verb
—
When you know something, you have facts or ideas in your mind.
I knew more things after I went to school.
I know a little Spanish.
I think I can do it, but I don't know.
—
You know a person, if you have met him or her.
Yes, I know John. I met him in class last week.
We want you to know that it will be OK.