Why did you turn against him? 你为何背叛他？
2） turn back 倒退
You can't turn back time. 你不能让时光倒流！
I wish I could turn back 5 years.我希望能倒退5年。
3） turn to 求助；转向
You can always turn to me for help. 你随时可以找我帮忙
On other issues central to India's security , like energy or building new coalitions at the global level , it is now more likely to turn to Brazil , South Africa or Russia .
在其它有关印度安全的核心问题（例如能源或在全球层面建立新的联盟）上，印度现在更可能把目光转向巴西、南非或俄罗斯。
4）turn into 转变成
Look what you turned him into. 看看你把他变成什么了！
5） turn sb. down 拒绝某人
Please don't turn me down. 请不要拒绝我。
He turned her down last night. 他昨晚拒绝她了。
6）turn down减小；调低(音量)
I do wish you would turn down the TV .
希望你能把电影关小声一点。
7）turn up出现；开大(音量)
You never know where happiness turn up next .
你不知道何时何地幸福就会降临。
Turn up the tap , and it abruptly sprays out in a chaotic (but describable) torrent .
把龙头开大，它会突然喷射出混沌的（但还可描述的）急流。
9） somebody's turn 轮到某人
Whose turn is it? 现在到谁了？
10）turn out结果是
It turn out, however , that some differences both between and within groups are quite marked .
然而，它也可能证明：两个种群之间和种群内部的一些差异是相当明显的。
11）turn on打开；发动
The last person who leaves the office needs to lock all the doors and turn on the alarm .
最后一个离开办公室的人要把所有的门锁上，并启动报警装置
12）turn off关掉；关闭
Turn off any outside gas lines , and let the house air for several minutes to remove escaping gas .
关闭所有暴露在外的煤气管道，并留出几分钟以放掉室内泄露的煤气。
13）turn over翻转
It could turn over the early whaling boats with one lash of its powerful tail .
它能用它有力的尾巴猛烈一甩打翻早期的捕鲸船。
14）turn in交出；交上；自首
Clean out your locker turn in your playbook and go see the coach .
清干净你的锁柜，交出比赛手册，然后和教练说再见。
例如：You must turn yourself in. 你必须去自首！
15）turn away避开；解雇；把…打发走
They never turn away the hungry .
他们绝不会把挨饿的人撵走。
16） turn somebody on 激起性欲
A sexy dress will turn me on. 一条性感的裙子就可以激起我的性欲。
You turned me on. 你激起了我的性欲。
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