My aunt is ___ doctor at the local hospital.
a (to say what somebody's profession is)
There is ___ big supermarket near my house.
a (singular countable noun mentioned for the first time)
Who is ___ president of France right now?
the (something unique)
___ children usually need a lot of sleep to stay healthy.
no article (plural countable noun in general)
We bought a new car yesterday. ___ car is dark blue.
The (somebody/something previously mentioned)
I saw ___ strange dog in our garden this morning.
a (singular countable noun mentioned for the first time)
His older brother wants to become ___ engineer.
an (to say what somebody's profession is)
She loves ___ flowers, especially red roses.
no article (plural countable noun in general)
Look at ___ sky! It looks like it is going to rain.
the (something unique)
They ate at ___ small restaurant. ___ restaurant served great pasta.
a / The (singular countable noun mentioned for the first time / somebody/something previously mentioned)
I need to buy ___ umbrella before the autumn starts.
an (singular countable noun mentioned for the first time)
Could you please open ___ window? It is very hot in here.
the (talk about specific things)
Where is ___ book that I lent you last week?
the (talk about specific things)
___ time is more valuable than ___ money.
no article / no article (uncountable noun in general)
My cousin works as ___ journalist for a popular newspaper.
a (to say what somebody's profession is)
___ fresh air is very good for your health.
no article (uncountable noun in general)