Englishfor English speakers
at
Preposition
—
Used to describe where something is, or when saying something's position
I am at home.
Let's meet at the pub!
—
The time at which something happened or will happen
Breakfast is at 9 o'clock.
At 5pm we went home.
—
Indicating something's state
At half price!
Water boils at high temperatures.
at
Symbol
—
The @ symbol, used to replace at
support@microsoft.com is an email address.
Apples @ £1.50 per kilogram.
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.
reasonable
Adjective
—
A reasonable amount or number is not too much or too big.
The hotel has good food, and the prices are reasonable.
—
If something is reasonable, it is fair and sensible.
It seems like a reasonable idea to me.
price
Noun
—
The amount of money you need to pay to buy something.
The price of this book is ten dollars.