Why is it kept locked?

...and kept...

The shop is kept under police supervision.

This is the diary which she kept.

His room is kept clean by her.

My favourite sport is being kept prisoner.

I've kept the tiles I've kept the floors

All he kept saying, all I kept hearing was

Kept it in and kept us moving, you know.

I kept singing.

She kept working.

She kept quiet.

He kept talking.

He kept singing.

We kept quiet.

Tom kept quiet.

Tom kept crying.

I kept wondering,

We kept traveling.

What kept you?

I kept digging.

Kept me going.

I kept driving.

You kept running.

But then, as the viewership kept growing and kept growing,

She is a bit indignant about being kept waiting.

The truth of the matter is kept absolutely secret.

I kept bugging her for a date. She kept saying no.

Brian kept Kate waiting.

The assistant kept 2.

Promises should be kept.

I kept on singing.

She kept on working.

She kept on crying.

She kept on talking.

They kept on walking.

He kept early hours.

He kept quite calm.

He kept me waiting.

He kept on singing.

He kept it secret.

He kept on crying.

The phone kept ringing.

The boys kept quiet.

The baby kept quiet.