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これはダメです。
This is no good.
Used to indicate that something is unacceptable, not allowed, or inappropriate.
ここでタバコを吸うのはダメです。
Smoking here is not allowed.
そんなに遅刻するのはダメです。
It's not acceptable to be that late.
Often used in casual or slightly formal contexts to express disapproval or prohibition.
While 'ダメです' is informal, it is not overly rude. For more formal contexts, consider using 'いけません'.
The tone of 'ダメです' can vary from gentle disapproval to strong prohibition depending on context and intonation.
From the negative form 'ダメ' (no good) combined with the polite copula 'です' (desu).
While 'ダメです' is informal, it can be used in both casual and slightly formal contexts. For more formal situations, 'いけません' is often preferred.