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
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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.
night
Noun
—
Night is the opposite of day. It is the time between sunset and sunrise when the sky is dark.
During the day, we'll go hiking on John Doe Mountain. At night, we'll come back to the hotel and get some sleep.
There was a terrible accident in the night that woke all of us up.
in
Preposition
—
Used to show that something is inside something else.
The cat is in the box.
—
Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
—
Used to show movement towards the inside.
The rain came in through the window.
Casablanca
—
noun
a port on the Atlantic and the largest city of Morocco