なくてはいけない
must do, have to do
This expression conveys a strong obligation or necessity to perform an action. It is often used in both formal and informal contexts to state what is required.
Meaning
This expression conveys a strong obligation or necessity to perform an action. It is often used in both formal and informal contexts to state what is required.
Formation
Explanation
「なくてはいけない」 is a grammatical structure used to express necessity or obligation. It indicates that something must be done or that the speaker feels compelled to take a certain action. This form can be perceived as stronger than other expressions of obligation like 「なければならない」, yet both serve similar functions.
This expression can function in both written and spoken Japanese, making it versatile for various contexts. When using this form, it’s important to consider the social context and relationships, as indicating obligation might not be as polite in some situations.
- Common Usage Context: When giving advice, setting rules, or discussing responsibilities.
- Nuance: While it expresses obligation, it doesn't always imply punishment for non-compliance; it may simply state what is expected.