Compulsory 对比 That's mandatory

在英语中何时使用每一个，包含含义、语域和例句。

Compulsory

正式 前 5000（相当常见） B2 adjective

That's mandatory

前 1000（非常常见）

最正式: Compulsory 最常见: That's mandatory

	Compulsory	That's mandatory
发音	🇬🇧 /["/kəmˈpʌlsəri/"]/ 🇺🇸 /["/kəmˈpʌlsəri/"]/	🇬🇧 //ˈmæn.də.tər.i// 🇺🇸 //ˈmæn.dəˌtɔr.i//
含义	必须做或必须遵守的事情。 Something that must be done or followed.	It's necessary or required.
例句	English is a **compulsory subject** at this level.	Attendance at the training session is mandatory.
语域	正式	中性
常见程度	前 5000（相当常见）	前 1000（非常常见）
CEFR 等级	B2	-
词性	adjective
搭配	compulsory education, compulsory attendance, compulsory courses, compulsory insurance	mandatory rules, mandatory requirements, mandatory attendance
反义	optional, voluntary, discretionary	optional, voluntary, discretionary
常见错误	Confused with 'optional'; it means the opposite., Often misspelled as 'compolsory'., Used incorrectly as an adverb; it is an adjective.	Used when the requirement is not serious., Confused with 'optional' meaning it’s not necessary., Saying it in an overly casual way.
用法说明	通常用在正式场合，比如法律或学术领域。在日常对话中尽量少用，可以换成 'required' 或 'mandatory'。 Used in formal contexts, often in legal or academic settings. Avoid using in casual conversation; instead, use 'required' or 'mandatory' in those contexts.	Use in situations where following a rule is important. Avoid in casual conversations.

在真实片段中看它

- Um, that's mandatory. - I think we know that.

That's mandatory

常见问题：Compulsory 对比 That's mandatory

Compulsory和That's mandatory 有什么区别？

Compulsory: Something that must be done or followed. That's mandatory: It's necessary or required.

哪个更正式：Compulsory和That's mandatory？

Compulsory 是其中最正式的。

哪个更常见：Compulsory和That's mandatory？

That's mandatory 在日常英语中最常见。

能各给一个例子吗？

Compulsory: English is a **compulsory subject** at this level. That's mandatory: Attendance at the training session is mandatory.

我可以互换使用 Compulsory和That's mandatory 吗？

不总是。Compulsory和That's mandatory 相关，有时可以互换，但在语域、常见程度和用法上不同，所以换用可能改变意思或语气。替换前先看看上面的区别。