be indentured to sb
常用被动语态；to 后接雇主或师傅。
He was indentured to a local carpenter for five years.
他按契约给当地一名木匠当了五年学徒。
用契约束缚；订立契约使…服务
先理解核心含义，再看它在真实句子里的用法。
用契约束缚；订立契约使…服务
bind (someone) by a legal contract, especially to work for another for a fixed period, as in an apprenticeship
一般现在时
They indenture young workers.
他们以契约约束年轻工人。
一般过去时
The master indentured the apprentice.
师傅以契约束缚学徒。
现在完成时
The servant has been indentured for five years.
这名仆人已被契约束缚了五年。
规则动词：indenture的过去式和过去分词形式。
In the 1700s, many parents indentured their children to tradesmen in order to learn a craft.
在18世纪，许多父母让子女与工匠订立学徒契约，以便学一门手艺。
用法提示：indentured 用作谓语动词过去式，表示‘凭契约使……做学徒’。
To pay for her passage to America, she indentured herself to a wealthy farmer for four years.
为了支付去美国的旅费，她把自己签约给一个富裕的农场主四年。
用法提示：indentured 为及物动词，后接反身代词，表示‘使自己受契约约束’。
The young tailor was indentured to a famous clothing maker when he was only twelve.
这位年轻的裁缝年仅十二岁时就被签约给一位著名的制衣师傅。
用法提示：was indentured 是被动语态，强调‘被契约束缚’。
常用被动语态；to 后接雇主或师傅。
He was indentured to a local carpenter for five years.
他按契约给当地一名木匠当了五年学徒。
for 后接契约规定的服务期限。
Many workers were indentured for three years.
许多工人按契约工作了三年。
grammar · medium
易错句子The indentured was signed by both parties.
正确表达The indenture was signed by both parties.
表示“契约”的名词是 indenture；indentured 是动词 indenture 的过去式/过去分词（或形容词），不能充当主语。因此合同被签署时要用名词 indenture。
grammar · medium
易错句子He decided to indentured himself.
正确表达He decided to indenture himself.
不定式符号 to 后必须接动词原形 indenture；indentured 是过去式/过去分词，不能用在 to 之后。
grammar · medium
易错句子He was indentured for a master.
正确表达He was indentured to a master.
表示“受契约束缚为某人服务”时用 be indentured to + 人；介词 for 通常接时间段或目的，不能引出服务的对象。
拼写和发音几乎相同，但指压出凹痕或把段落缩进，与“签订契约、限期服务”毫无关系；看到 indent 后接文字、段落时，取“缩进”义。
都含“人身受制于人”，但 enslaved 指被剥夺自由、当作财产占有，没有合同也没有期限；indentured 则依据契约、有明确服务年限，期满即解除。
英式用法，专指与律师、会计师等专业行号签订学徒合同（articles），适用范围窄；indentured 可用于学徒、契约劳工等多种限期服务，且多见于历史叙述。
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