altered + noun
作定语，放在名词前，表示‘经过改动的、被篡改的’；指动物时意为‘已绝育的’。
The police are looking for an altered passport.
警方正在寻找一本被涂改过的护照。
改变的；更改的
被阉割的；被绝育的；已从原始形式改变了的；已绝育的；已切除睾丸或子宫和卵巢以防止繁殖的
指形状、性质等与原来不同
已从原始形式改变了的
Having been changed from an original form.
已绝育的；已切除睾丸或子宫和卵巢以防止繁殖的
Neutered; having had testicles or uterus and ovaries removed to prevent procreation.
The altered plans caused some confusion among the team members.
改变后的计划在团队成员中引起了一些困惑。
用法提示：这里“altered”作为形容词，修饰“plans”，表示计划被修改或改变后的状态。
She noticed that the altered painting looked completely different from the original.
她注意到改变后的画作看起来与原始画作完全不同。
用法提示：在句中“altered”修饰“painting”，强调画作经过修改后的样子。
After the accident, his memory of the event remained unaltered despite the trauma.
事故发生后，他对事件的记忆尽管经历了创伤却依然未改变。
用法提示：此处“altered”以反义形式出现，通过“unaltered”说明记忆未受影响。
作定语，放在名词前，表示‘经过改动的、被篡改的’；指动物时意为‘已绝育的’。
The police are looking for an altered passport.
警方正在寻找一本被涂改过的护照。
作表语，常与 be、look、seem 等系动词连用，描述状态的变化。
Her voice seemed altered on the phone.
她在电话里的声音似乎变了。
用于‘leave + 宾语 + altered’结构，表示使某人或某物处于改变后的状态。
The experience left him permanently altered.
这段经历使他彻底改变了。
grammar · medium
易错句子We need an altered plan to solve this problem.
正确表达We need an alternative plan to solve this problem.
altered 意为“已被改动的”，指某物本身被修改过；表示“可替代的、另一个”要用 alternative。两者词形相近，容易混用。
grammar · medium
易错句子She altered her mind about the job offer.
正确表达She changed her mind about the job offer.
“改变主意”的固定搭配是 change one's mind，alter 不能用于该搭配；alter 侧重对事物的外观、结构做改动，如 alter a dress。
grammar · medium
易错句子The dress was alter by the tailor.
正确表达The dress was altered by the tailor.
被动语态由 be + 过去分词构成，alter 的过去分词是 altered，不能像中文那样直接用动词原形。
changed 用法最普通，泛指任何变化，可以是自然发生的；altered 强调在原物基础上做了改动，改动后通常仍是同一事物。
modified 偏正式，强调为某个目的有意做出的部分调整；altered 只说明已不同于原样，不一定有明确目的或改进意图。
alternated 是动词 alternate 的过去分词，指两者轮流出现；它与 altered 拼写只差几个字母、读音也接近，但意思完全不同，勿混用。
（意识）改变的状态
The drug put him in an altered state.
这种药物让他进入一种意识改变的状态。
改变了的外貌
He came home with a greatly altered appearance.
他回家时外貌大变。
被显著改动的
The final report was significantly altered.
最终报告被做了重大修改。
被篡改的文件
The bank refused to accept the altered document.
银行拒绝接收那份被篡改的文件。
已绝育的猫
She brought home an altered cat from the shelter.
她从收容所领回家一只已绝育的猫。
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经化学改变的
The flavour comes from chemically altered fats.
这种味道来自经化学改变的脂肪。