7 предложений раздельно со словом on a summer night и отдельно

I like to watch the stars on a summer night.
I can't go to bed on a summer night.
It happened on a summer night.
We danced and talked on a summer night.
There was a thunderstorm on a summer night.
We heard the warbling of a nightingale  on a summer night.
The book "All on a Summer Night" was written by Ray Bradberry.

The streets are illuminated at night.
The flowers close up at night.
The captain ported the ship at night.
Most crimes happen at night.
It's 11 o'clock at night.
I have trouble sleeping at night.
The Labour Code protects women working at night.