如题所述
ON表示“开”，OFF表示“关”。
此时的on和off都是副词。
on: (机器、电器等) 工作着
The radio was on but the door was closed.
收录机开着，但是门关着。
off: (机器、电器等) 关闭着
He saw her bedroom light was off.
他看见她卧室的灯关着。
此时的on和off都是副词。
on: (机器、电器等) 工作着
The radio was on but the door was closed.
收录机开着，但是门关着。
off: (机器、电器等) 关闭着
He saw her bedroom light was off.
他看见她卧室的灯关着。
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