on是开还是关的意思(on 和 off 用于电器的开启或关闭)

ON是表示开关的打开，相对应的OFF是表示关闭的意思。ON的含义是表示工作着的，发生着的、打开着的。在现代的许多家电中，开关的标识通常是用ON\OFF来表示该电器的开关。在生活中看见开关上显示着ON与OFF的时候只需要将开关调至对应的标识即可。


on/off 的用法(1)

on 和 off 用于电器的开启或关闭

我们说:

the light is on / put the light on / leave the light on etc.

turn the light on/off or switch the light on/off

Shall I leave the lights on or turn them off?

‘Is the heating on?’ ‘No, I switched it off.’

此外还有：

put (music, a song) on, put the kettle on:

Let’s put some music on. What would you like to hear?

We need boiling water, so I’ll put the kettle on.

on 和 off 用于事件的发生或结束

go on = happen

What’s all that noise? What’s going on? (= what’s happening)

call something off = cancel it

The concert in the park had to be called off because of the weather.

put something off, put off doing something = delay it

The election has been put off until January.

We can’t put off making a decision. We have to decide now.

on 和 off 用于衣服的穿戴或脱下.

put on clothes, glasses, make-up, a seat belt etc.

My hands were cold, so I put my gloves on.

put on weight = get heavier

I’ve put on two kilos in the last month.

try on clothes (to see if they fit)

I tried on a jacket in the shop, but it didn’t look right.

take off clothes, glasses etc.

It was warm, so I took off my coat.

off = 离开某地或某人

be off (to a place)

Tomorrow I’m off to Paris. / I’m off on holiday.

(= I’m going to Paris / I’m going on holiday)

walk off / run off / drive off / ride off / go off (similar to walk away / run away etc.)

Anna got on her bike and rode off.

Mark left home at the age of eighteen and went off to Canada.

set off = start a journey

We set off early to avoid the traffic. (= We left early)

take off = leave the ground (for planes)

After a long delay, the plane finally took off.

see somebody off = go with them to the airport/station to say goodbye

Helen was going away. We went to the station with her to see her off.

off,on各代表什么
 

ON和OFF表示的是电源的开状态与关闭状态，ON是开（机）的意思； OFF是关（机）的意思，当然有些汽车开关上也标注有比如大灯开关。

OFF，[ɔ:f, ɔf]

prep. 离开；脱落

adv. 切断；走开

adj. 远离的；空闲的

OFF是英语表示关闭或离开状态的意思，所以OFF是关闭的意思。

ON

prep.（表示方向） 向; （表示对象） 对

adv.（放，穿，连接） 上; 向前，（继续）下去;

adj. 活动着的情况，状态; 使用着的; 发生着的; 计划中的

ON是英语表示继续，发生着，所以ON是打开的意思。