They can switch on and off a billion times a second.
The young student had gone in before them and switched on the light.
I switched on the reading light at the head of my bed.
She went to the door and switched on the light.
He put out a hand and switched on a light.
She switched on the light and got out of bed.
She put out her hand and switched on the light.
A very old couple came in and switched on the television.
He switched on the light, sat up and looked around.
He opened his front door and switched on the light.
Phrasal Verbs
