declare + noun phrase
直接跟名词，表示宣布某事。
The country declared independence in 1945.
该国于1945年宣布独立。
宣布；宣告；声明
declares — third person singular of declare
申报；亮牌；摊牌；宣布（一局）结束；宣告；宣认
to state or announce something formally, officially, or clearly
正式、官方、明确或强调地断言或宣布。
To assert or announce formally, officially, explicitly, or emphatically.
向海关或税务官员申报进口货物或所得、开支等影响纳税的情况。
To inform government customs or taxation officials of goods one is importing or of income, expenses, or other circumstances affecting one's taxes.
亮出手牌以得分。
To show one's cards in order to score.
(选举中选区)正式宣布结果。
For a constituency in an election to officially announce the result
板球测试赛中,队长为节省时间而宣布本队击球结束(让对方击球),无需等全员出局。
The decision of the captain to let the bowling side bat in test cricket to save time without being all out.
(编程中)显式声明(变量、函数等)的存在,而不必描述其具体内容。
To explicitly establish the existence of (a variable, function, etc.) without necessarily describing its content.
宣告某事必成或肯定一个境况,期望其属灵实现；区别于祈求式的祷告。
To state that a thing shall happen or affirm a condition in the hopes of seeing it happen spiritually, in contrast to prayer which takes the form of a request.
一般现在时
I declare my income every year.
我每年申报收入。
一般过去时
He declared his intention yesterday.
他昨天宣布了他的意图。
现在进行时
She is declaring the results now.
她正在宣布结果。
The president declared a national holiday to celebrate the victory.
总统宣布了一个全国性的假日来庆祝胜利。
用法提示：这里的 "declare" 表示 "正式宣布"，是及物动词后面接宾语。
She declared her intention to run for mayor next year.
她声明她明年要竞选市长。
用法提示："declare" 在此表示 "明确声明"，后面接名词短语和不定式。
The customs officer asked him to declare all items he bought abroad.
海关官员要求他申报所有在国外购买的物品。
用法提示："declare" 在此表示 "申报"，常用于海关语境。
直接跟名词，表示宣布某事。
The country declared independence in 1945.
该国于1945年宣布独立。
后接that从句，用于陈述事实或主张。
He declared that he had no intention of resigning.
他声明自己无意辞职。
declare后接宾语和补足语，to be可省略。
The court declared the contract (to be) invalid.
法院宣布合同无效。
declare for表示赞成，declare against表示反对。
The committee declared for the new policy.
委员会表态支持新政策。
announce 侧重公开告知，declare 更强调正式和权威性
proclaim 语气更强烈，常用于重大或官方宣告
assert 强调自信和主张，不一定官方
affirm 侧重肯定和证实，语气正式
state 泛指陈述，较中性，不强调权威性
grammar · medium
易错句子He declared me his innocence.
正确表达He declared his innocence to me.
declare 不能像 tell 那样直接跟间接宾语（人）作双宾语，正确结构是 declare sth. to sb.。
grammar · medium
易错句子The committee declared the project as a success.
正确表达The committee declared the project (to be) a success.
declare 接宾语补足语时，不应使用 as，正确形式是 declare + 宾语 + (to be) + 补语。
announce 侧重公开通知计划或事件，常是临时或具体宣告；declare 更正式，用于声明立场、申报或法律上的正式宣告。
assert 强调自信或强硬地宣称，常缺乏证据；declare 则多指权威或官方声明，更有信服力。
claim 常指声称某事为事实，可能存疑或需验证；declare 是郑重、明确的宣布，通常认可度高。
宣战
The country declared war on its neighbor.
该国对其邻国宣战。
宣布胜利
The candidate declared victory after the election results were announced.
选举结果公布后，该候选人宣布获胜。
宣布破产
The company declared bankruptcy due to massive debts.
该公司因巨额债务宣布破产。
宣布独立
The colony declared independence from the mother country.
该殖民地宣布脱离母国独立。
申报收入
You must declare all your income on the tax form.
你必须在纳税申报单上申报所有收入。
宣布某人无罪
The court declared the defendant innocent.
法庭宣布被告无罪。
prefix
root
宣战
The country declared war on its neighbor.
该国向其邻国宣战。
宣告破产
The company declared bankruptcy after years of losses.
该公司在多年亏损后宣告破产。
表明身份/立场
He declared himself a candidate for the presidency.
他表明自己是总统候选人。
我宣布破产！
Michael Scott in the TV show The Office
电视剧《办公室》中的迈克尔·斯科特
Dictionary facts from ECDICT, WIKTIONARY.