Are helps form questions and negative sentences with you, we, and they. It goes before the subject in questions.
Are they coming to the party?
You are not tired, are you?
Are is a metric unit of area equal to 100 square meters. It is used mainly to measure land or property size.
The field covers two are in size.
This garden is five ares large.
Are shows something exists or is present, often in poetic or literary style. It introduces information or objects.
Here are the keys you asked for.
There are many stars tonight.
Are links the subject with a description or group in logic and maths. It shows a statement of fact or definition.
All squares are rectangles.
Some dogs are pets.
