The emotion they gave me was exquisite, but I could not preserve it, nor could I indefinitely repeat it; the most beautiful things in the world finished by boring me.

Falling interest rates have stimulated the automobile market.

Tokyo landlords are in a panic because the real estate market went soft.

What animals inhabit those islands?

You can't turn the heat off as long as the system is operating.

There are cases where the system doesn't go.

If you press this button, the machine will start.

The reason why he didn't make it in that accident was because his airbag didn't trigger properly.

I spent the weekend writhing in agony when my gallstone started to move.

The coffee mill that I received does not work.

A tiny object moved in the dark.

The glacier moves but by inches.

These special characteristics explain its preference for still-hunting (lying motionless beside a seal's breathing hole, waiting for one to surface).

He felt himself shaken at the news.

The grammar section includes the passive voice of the present perfect.