Englishfor English speakers
are
Verb
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Are is the present tense, second person form of the verb be.
Hello John, how are you?
We are all happy.
Are we there yet?
John and Mary are playing.
Are you all hungry?
interested
Adjective
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If you are interested in something, you want to pay attention or do something because it gives you new information or it entertains you.
I'm not very interested in cars.
in
Preposition
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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.