Meaning & usage
だろう expresses the speaker's conjecture, adding a 'probably' or 'I suppose' tone to a statement or exclamation. It follows the plain form of verbs and i-adjectives, and noun or na-adjective stems, and is the casual counterpart of でしょう.
Example sentences 8
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下着を買いに行くんだよ。お前、まだノーパンだろうが。
We're going to buy underwear. You're still not wearing underpants, are you?
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10ヶ国語を話せたらどんなにかっこいいだろう!
It would be so cool if I could speak ten languages!
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来年ここに新しいホテルが建てられるだろう。
A new hotel will be built here next year.
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今、ようやくツケがまわってきたのだろう。
So it's finally time to pay the piper.
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兄弟がいるとどんなだろうといつも思う。
I've always wondered what it'd be like to have siblings.
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わびをいれるなら早い方がいいだろう。
If you're going to apologise, sooner is better.
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私ならそう言っただろうと思う。
This is what I would have said.
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ヒトラーは後生の悪い人だろう。
I think Hitler will have an unpleasant afterlife.