countersign [document]
动词后直接跟需要联署的文件。
The treasurer must countersign the check.
财务主管必须副署这张支票。
在(文件)反面签名；副署,在文件上加第二个签名以确认另一人签名的有效性；确认
to add a second signature to a document, usually on the opposite side, in order to confirm another person's signature remains valid
在(文件)反面签名
To sign on the opposite side of (a document).
副署,在文件上加第二个签名以确认另一人签名的有效性
To add a second signature to a document, affirming the validity of the signature of another person.
一般现在时
The officer countersigns the document.
官员副签这份文件。
一般过去时
She countersigned the check yesterday.
她昨天副签了支票。
现在进行时
He is countersigning the orders now.
他正在副签命令。
规则动词：过去式和过去分词加-ed。
The manager must countersign the contract before it becomes legally binding.
合同必须由经理副署后才能具有法律效力。
用法提示：countersign 作为动词，表示副署签名以确认文件有效性。
After the officer approved the visa, the ambassador countersigned it.
警官批准签证后，大使进行了副署。
用法提示：countersigned 是过去式，表示在他人签名后附加签名以证实。
The accountant is countersigning the check to authorize payment.
会计正在副署支票以授权付款。
用法提示：countersigning 是现在分词，表示正在进行的副署动作。
动词后直接跟需要联署的文件。
The treasurer must countersign the check.
财务主管必须副署这张支票。
被动结构强调动作的执行者。
The contract was countersigned by the manager.
合同由经理副署确认。
grammar · medium
易错句子The manager countersigned on the contract.
正确表达The manager countersigned the contract.
countersign 是及物动词，后面直接跟宾语，不需要介词 on。正确用法是 countersign + 宾语（被副署的文件）。
grammar · medium
易错句子Please countersign your name on the application form.
正确表达Please sign your name on the application form.
countersign 指在已有签名的基础上再次签名以确认，而首次签名应用 sign。如果文件尚未有签名，使用 countersign 不恰当。
不同于“副署”，"cosign"通常指共同承担责任的联署，而"countersign"指为确认真实性而附加的签名。
虽同为“counter-”前缀，但“counterfeit”指伪造、假冒，而“countersign”指正式副署。
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