だろうRight?, Probably, Isn't it?

Both でしょう and だろう express conjecture (e.g., 'It's probably…') or seek confirmation when used with rising intonation in a question (e.g., 面白いでしょう？ or 面白いだろう？ = 'It's interesting, right?'). でしょう is more polite and used with strangers or those of equal or higher rank, while だろう is casual and blunt, used with close friends, family, and in informal settings.

かもしれない (polite form かもしれません) and だろう (polite form でしょう) are both casual phrases used to express uncertainty or possibility, but with different degrees of certainty. かもしれない is less certain, similar to 'maybe' or 'might,' while だろう expresses a higher degree of certainty, like 'probably' or 'I guess.'

だろう, in addition to expressing conjecture ('It's probably…'), can seek confirmation or agreement from the listener (e.g., 面白いだろう = 'It's interesting, right?'). じゃないか is more forceful and assertive, suggesting the speaker strongly believes something and expects agreement (e.g., 面白いじゃないか = 'It's interesting, isn't it!'). Both are casual forms and should be avoided in polite conversation.

だろう is a form of だ used to express mild uncertainty (like 'It's probably…') or to seek confirmation from the listener ('It's this, right?'). のではないだろうか is similar but expresses much less certainty, with a nuance of wondering or seeking confirmation or approval ('I wonder if it's…?').

だろう is a form of だ used when the speaker feels uncertain. It's often translated as 'probably,' 'I guess,' or '...right?' when asking a question. In contrast, ね is used to seek confirmation or agreement, often translated as '...isn't it?' These two can combine to express both uncertainty and confirmation, as in 面白いだろうね ('It's probably interesting, isn't it?').