1
assure sb that + clause
that从句表达保证的具体内容。
He assured me that the package would arrive on time.
他向我保证包裹会按时到达。
使确信；向……保证
assured — past of assure
先理解核心含义，再看它在真实句子里的用法。
使确信；向……保证
to tell someone firmly and confidently that something is true, especially to stop them worrying
He assured me that the package would arrive on time.
他向我保证包裹会按时到达。
确保和保障；保证
To make sure and secure; ensure.
使(某人)对(某事)有信心
To give (someone) confidence in the trustworthiness of (something).
使安心
To reassure.
assure
Base
原形
assures
3rd person
第三人称单数
assuring
-ing
现在分词
assured
Past
过去式
assured
Past participle
过去分词
I assure you that everything is fine.
我向你保证一切都没问题。
He assured me of his support.
他向我保证了他的支持。
They have assured the safety of the product.
他们已经确保了产品的安全性。
注意：assure 后接人时常用结构 assure sb of sth 或 assure sb that...
She assured me that the train would leave on time.
她向我保证火车会准时出发。
The guide assured the tourists of a beautiful view from the top of the mountain.
导游向游客保证，从山顶能看到美丽的景色。
Please assure yourself that the door is locked before you leave.
离开前请确认门已经锁好。
that从句表达保证的具体内容。
He assured me that the package would arrive on time.
他向我保证包裹会按时到达。
of后接名词或动名词，表示保证的事物。
The manager assured us of her support.
经理向我们保证她的支持。
直接接宾语，表示确保某事物。
The new contract assures job security for employees.
新合同保证了员工的工作安全。
Not this
I assure to finish the report on time.
Use this
I assure you that I will finish the report on time.
assure后不能直接跟不定式，需接sb. + that从句或sb. of sth.结构。
Not this
Please assure the door is locked before leaving.
Use this
Please ensure the door is locked before leaving.
assure用于使人确信，ensure用于确保某事发生；此处应用ensure。
Not this
She assured that everything was fine.
Use this
She assured me that everything was fine.
assure是及物动词，必须接宾语（被保证的人），不能直接接从句。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
向某人保证某事
The manager assured us of the product's safety.
经理向我们保证了产品的安全性。
确保……
Please assure that all doors are locked before leaving.
请确保离开前所有门都锁好了。
放心；确信
You can rest assured that your information is confidential.
你可以放心，你的信息是保密的。
保证质量
Our company constantly strives to assure quality in every product.
我们公司不断努力确保每一件产品的质量。
保证安全
The new regulations are designed to assure safety at work.
新规定旨在保证工作安全。
确保成功
Hard work alone cannot assure success; you also need strategy.
仅靠努力不能确保成功，还需要策略。
放心
Rest assured, the matter is being handled.
请放心，这件事正在处理中。
向某人保证某事
I can assure you of our full cooperation.
我可以向你保证我们会全力合作。
我向你保证，我们不是。
In The Princess Bride, Vizzini assures the Man in Black that they are not the Dread Pirate Roberts.
在电影《公主新娘》中，维齐尼向黑衣人保证他们不是恐怖海盗罗伯茨。
我向你保证，我不是女巫。
The woman assures the court that she is not a witch.
这个女人向法庭保证她不是女巫。
Use assured naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把assure拆成as sure，像在说'肯定如此'，让人放心。
常见场景：承诺、安慰、确认 通常用于正式或中性场合，表达向某人保证某事的真实性或确定性，比较常见于日常交流、商业沟通或书面语中。
Ensure and insure rhyme with assure (both have /ʃʊr/). Censure and pressure share the spelling ending '-sure' but have a different stress pattern and a schwa vowel, so they do not rhyme.
Dictionary facts from ECDICT, WIKTIONARY.