turn on

Separable

Start an appliance, light or tap

Turn the TV on. The match starts now.

Separable

The object can go between the verb and the particle: turn the light off, or turn off the light. When the object is a pronoun it must go in the middle: turn it off, never turn off it.

The particle: on

This verb belongs to the group ‘starting and wearing’.

Others in the group: put on, switch on.

Practise it

Add it to your daily practice or see every verb with on.

Further reading: turn on on Wiktionary (CC BY-SA).