1
be sworn in as + noun
sworn in 固定短语，表示正式就职。
He was sworn in as president.
他宣誓就任总统。
宣誓过的；发过誓的
先理解核心含义，再看它在真实句子里的用法。
宣誓过的；发过誓的
bound by or stated on oath
He was sworn in as president.
他宣誓就任总统。
swear的过去分词，常作形容词
在宣誓下给予或声明的
Given or declared under oath.
如同宣誓般受约束的
Bound as though by an oath.
热情的,虔诚的
Ardent, devout.
She gave a sworn statement to the police.
她向警方提供了一份宣誓过的陈述。
They have been sworn enemies for years.
他们是多年的死敌。
The judge asked for a sworn affidavit.
法官要求提供一份宣誓书。
sworn in 固定短语，表示正式就职。
He was sworn in as president.
他宣誓就任总统。
表示发誓做某事。
They are sworn to protect the country.
他们宣誓保卫国家。
sworn 作定语，通常修饰 enemy, ally, statement 等名词。
They are sworn enemies.
他们是死对头。
Not this
He sworn to tell the truth.
Use this
He swore to tell the truth.
“sworn”是过去分词，不能单独作过去式。表示过去发生的动作应用过去式“swore”。
Not this
He has swore to protect her.
Use this
He has sworn to protect her.
现在完成时需用过去分词“sworn”，过去式“swore”不可用于完成时。
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