switch/swɪtʃ/

vt

1. 改变；转移；调动

• He switched the talk to another subject. 他把话题转到另一个题目上去。

• She was switched to a new job. 她被调去做一个新工作。

2. 调换；对调

• switch one's job with sb. 和某人对调工作

• Someone must have switched the suitcases at the airport. 一定有人在机场把皮箱调换了。

3. 用开关把…开启(或关掉)

• The traffic police switched the lights from green to red. 交通警把绿灯转为红灯。

vi

1. 改变；转移

• During the competition the lead switched many times. 在竞争中，领先地位多次易手。

• She switched over to medicine and graduated last year. 她改学医科，于去年毕业。

2. 调换；交换

• I'll switch with her tonight. 今晚我跟她换班。

词组switch around 改变…的位置

• We often switch the furniture around. 我们经常变动家具的位置。

switch back 恢复原状

• The new method doesn't go well, so we may have to switch back. 这个新方法不怎么好，所以我们可能还得恢复原来的办法。

switch off 关掉；用开关切断（电流）

• switch off the ignition 关掉点火装置

switch off the electricity切断电源

2. 突然消失；停止讲话

• switch off the smile 突然收敛笑容

• He's so talkative that it's impossible to switch him off. 他太健谈了，很难让他闭嘴。

3. 不注意；感到厌烦

• His mind often switches off in the classroom. 他上课时总是心不在焉。

switch on

1. 开启；用开关接通（电流）

• switch on the radio 打开收音机

2. 摆出；使出

• The waitress switched on an automatic smile as we stepped in the restaurant. 我们步入饭店时，女服务员迅速露出一个僵硬的笑容。

3. 使兴奋

• The music switches us on. 那音乐使我们浑身来劲。

switch out 把…从电路切断 switch through 转接（电话）

• That phone call was switched through to our office carelessly. 那个电话不小心被转接到我们办公室里来了。