turn on打开（电器，水龙头等），turn off关闭（电器，水龙头等）（一）名词作宾语：例句：（1）I turned on the television just now.（2）I turned the television on just now.句（1）和句（2）的意思完全相同，都是“我刚才打开了电视机”，名词television作turned on的宾语，名词既可以放在动词短语之后（turned on the television），也可以放在动词短语之间（turned the television on）。
（3）Amy turned off the lights and went out of the room.（4）Amy turned the lights off and went out of the room.句（3）和句（4）的意思完全相同，都是“Amy关上了灯走出了房间”。
（二）代词作宾语：例句：（1）if you want to listen to the radio, please turn it on.（如果你想听收音机，请把它打开吧）句中代词it作turn on的宾语，it 只能放在动词短语的中间（turn it on）。
（2）Why are these taps on? Please don't waste water. Turn them off.（为什么这些水龙头都开着？请不要浪费水，把它们都关上）句中代词them作turn off的宾语，them只能放在动词短语的中间（turn them off）。