He is doing time in prison.

I was studying the whole time.

I always like to plan ahead of time for my vacations.

I enjoy reading in my spare time.

I need some time to think about it.

I went skiing for the first time.

As time goes by, life begins to feel very short.

Time will tell if they are right or wrong.

I am busy most of the time.

I have spent a cumulative time of 100 hours playing video games.