Grammar Info

N5 Lesson 3: 6/13


Right?, Probably, Isn't it?


Verb + だろう, Adjective + だろう, Noun + だろう


  • Part of Speech

    Auxiliary Verb

  • Part of Speech

    Dependent Word

  • Register


  • 品詞


  • 単語の種類


  • 使用域


About だろう

だろう is a conjugated form of , and can also be seen in the contracted form だろ (more casual). だろう expresses that the speaker thinks that something is true (assertion/expectation), and also that the listener would probably agree with them. This comes across like 'right?', or 'probably' in English.

だろう carries exactly the same meaning as でしょう (the polite equivalent). However, due to だ being more casual than です, だろう is also considered to be more casual/masculine than でしょう.


While だろう is usually used when the speaker has some sort of information that would support their assertion, it can also be used simply when the speaker 'feels' that something is true.

  • これ、お菓子(かし)だろう
    This is candy, isn't it?

In this kind of sentence that expresses a 'feeling' or 'hunch', だろう comes across as quite low confidence. The speaker's tone of voice will often reveal how confident だろう is.




    This place here is good (right?)


    It's you (right?)


    This is a pen. (right?)


    Tonight is busy (right?)


    This is water, right?

  • Get more example sentences!

    Premium users get access to 12 example sentences on all Grammar Points.

Self-Study Sentences

Study your own way!

Add sentences and study them alongside Bunpro sentences.

だろう – Grammar Discussion

Most Recent Replies (7 in total)

  • Lamster


    Unless I’m mistaken, “masculine” expressions simply use the plain forms of verbs. There’s nothing inherently “masculine” about that.

    It’s just that society thinks it’s more acceptable for men to speak in a plain/not particularly polite way, while women are supposed to be polite and cute and cultured and whatever.

    I’d suggest just learning the grammar and then deciding for yourself what’s acceptable to use for you and in which situations. And until you can do that, just use the polite form of everything, regardless of your gender.

  • MZa


    The explanation says that だろう is a conjugated form of だ’. I was wondering which form it is. The おう ending would point to the volitional form. Is that right? If it is, the nuance of だろう compared to だ would make sense.

    Edit: i did a bit of research and it seems that my hypothesis is right. Since だ is a shortened である and あろう is the volitional form of ある, であろう would have been shortened in だろう, right?

  • MZa


    Since だろう is just a form of だ as said in the new explanation, I guess there is no more reason to use a particle when using the former than when using the later.

Got questions about だろう? Join us to discuss, ask, and learn together!

Join the Discussion