1
turned + noun (food)
用于描述食物已变质
turned milk
变质的牛奶
变质的
先理解核心含义，再看它在真实句子里的用法。
变质的
spoiled or soured, as milk
turned milk
变质的牛奶
变质的；被转动的；[金属加工]车削的
a. moved around an axis or center
The milk is turned, so don't drink it.
牛奶变质了，所以别喝它。
The key is turned to the right position.
钥匙被转到了正确的位置。
The turned metal part has a smooth finish.
车削的金属零件表面光滑。
用于描述食物已变质
turned milk
变质的牛奶
用于描述经车床加工的产品
turned parts
车削零件
系表结构表示状态，常见于描述变质或转动状态
The milk is turned.
牛奶变质了。
Not this
The leaves are turned yellow.
Use this
The leaves are turning yellow.
在英语中，进行时态需要使用现在分词（动词+ing），而不是过去分词。
Not this
The milk was turned sour by the warm weather.
Use this
The milk turned sour because of the warm weather.
当'turn'表示'变成'时，是不及物动词，不能用于被动语态。
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Dictionary facts from ECDICT.