Englishfor English speakers
a
Determinative
—
A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
—
A is the first letter of the alphabet.
The letter "a" comes before "b".
—
In some schools, an A is a very high grade.
Ron got an A on his earth science test.
big
Adjective
—
If something is big, it is large in size; tall, wide, long, or fat.
He's bigger than me.
I would like a big glass of milk.
The tree was so big that you could see it over the top of the house.
—
If something is big, it is important.
That's a big problem!
—
Someone's big brother or a big sister is one who is older than the person.
I have a big brother who's stronger than you!
wig
Noun
—
A wig is a type of artificial hair. It can be worn by actors to change their hairstyle without affecting their original hairstyle, by people who do not have hair, or just to look better.
She took off her blond wig to reveal a bald head