They can switch on and off a billion times a second.

They will switch on and off in the first two weeks.

But he could see the small black switch on the side.

The Face was looking toward the light switch on the wall.

She switched on the light and got out of bed.

He switched on to see if the set was still working.

There was a light switch on the wall near the door.

Her hand was out to switch on the light when it happened.

She went to the door and switched on the light.

The young student had gone in before them and switched on the light.

The switch on the other side of it was down.

I switched on the light and looked at the floor by the bed.

With his free hand, he moved four switches on the control wall.

He took a step inside, and switched on a light.

There was an outside light which no one, so far, had thought to switch on.

It was easy to make her way without switching on a light.

A very old couple came in and switched on the television.

She knew what it was, before switching on the light.

I switched on the reading light at the head of my bed.

That is something we have to be really switched on.

He opened his front door and switched on the light.

It switches on every night, but the need is gone.

He switched on the light, sat up and looked around.

He reached in past me to switch on a light.

A light switched on at the end of the hall.

These are switched on, just to make her feel a little more welcome.

"He was switched on when I came into the room."

The lights in the room had not been switched on yet.

It meant nothing, she used to say, if they were switched on earlier.

The former get warm first when the system is switched on from cold.

There was no sound of a light's being switched on in the sitting room, but we might not have been able to hear it.

It was quite dark, no lights had been switched on.

There are two common types both of which can be switched on or off according to need.

All the lights that she'd passed had been switched on.

Then, as though a light had been switched on, the service staff went into gear.

I had to be switched on and fight the boredom.

In another minute the door opens and the light is switched on.

You've got to take it for granted that these people are switched on.

This has been switched on all afternoon and left flat.

Bruce felt as though a light had been switched on somewhere in his head.

If there was any slack you would see it when the current is switched on.

Then, making sure her mobile was switched on, she set about the task.

The wall lamps were switched on and the room became very bright.

The recorder had been switched on and off a few times while the man obviously told the boy what to say.

When the two policemen entered the room a light was switched on.

Little electric lights could be switched on up there if anything went wrong in the night.

The footsteps moved to the kitchen and the light there was switched on.

Usually the lights are switched on after the credits, sometimes already during them.

When driving, car headlights must be switched on at all times, both night and day.