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backdate sth
backdate 是及物动词，宾语常为发票、合同、支票等文件。
They backdated the invoice.
他们倒填了发票上的日期。
倒填日期；把…的日期填早
backdating — present participle of backdate
先理解核心含义，再看它在真实句子里的用法。
倒填日期；把…的日期填早
to assign a date to a document that is earlier than the actual or current date
They backdated the invoice.
他们倒填了发票上的日期。
在文件上填写比实际日期更早的日期。
To give or assign a date to a document that is earlier than the current or true date.
backdate
Base
原形
backdates
3rd person
第三人称单数
backdating
-ing
现在分词
backdated
Past
过去式
backdated
Past participle
过去分词
I backdate the check to last week.
我把支票日期回溯到上周。
She backdated the contract to January.
她把合同日期回溯到一月。
They have backdated the payment to avoid fees.
他们已经把付款日期回溯以避免费用。
规则动词，过去式和过去分词加-ed。
The contract was backdated to the beginning of the month.
这份合同上的日期被回溯到月初。
They decided to backdate the invoice to avoid a late fee.
他们决定把发票日期填早以避免滞纳金。
The manager is backdating the approval form right now.
经理正在把批准表上的日期填早。
backdate 是及物动词，宾语常为发票、合同、支票等文件。
They backdated the invoice.
他们倒填了发票上的日期。
用 to 引出所填写的更早的具体日期。
She backdated the letter to Monday.
她把信上的日期倒填到星期一。
by 后接倒填的时间长度；被动结构在涉及文件或付款时很常用。
The check was backdated by two weeks.
这张支票的日期被倒填了两周。
Not this
Please backdate the invoice to next Monday.
Use this
Please postdate the invoice to next Monday.
backdate 表示把日期填为早于当前/真实日期；若要填为未来日期，应改用 postdate。
Not this
The contract backdated to last month.
Use this
The contract was backdated to last month.
backdate 是及物动词，必须带宾语；此处契约是被倒填日期，所以要加 be 构成被动语态 was backdated。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
倒填文件日期
She backdated the document to last Monday.
她把文件日期倒填到上周一。
在支票上填写较早日期
He backdated the check by three days.
他把支票日期倒填了三天。
倒填申请日期
The office refuses to backdate applications.
办公室拒绝倒填申请日期。
将日期倒填至
The contract was backdated to January 1st.
合同日期被倒填至1月1日。
倒填付款日期
They backdated the payment to cover the delay.
他们倒填付款日期以弥补延误。
Use backdating naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
back（往回）+date（日期），想象把日历往回翻，在文件上填上更早的日期。
语域：neutral 常见场景：contracts、payroll、legal documents 该词通常用于合同、法律文件和薪资结算等书面语境，日常口语中较少出现；没有强烈的正式或非正式色彩，属于中性词。
常用于被动语态，如 be backdated to
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.