GRAMMAR
だろう
~ right? (casual)
Explanation
NOTE
だろう means probably ~ or I think ~. It expresses the speaker's conjecture or guess about something. It is the plain form of でしょう.
NOTE
Attach だろう to the plain form of verbs, adjectives, and nouns. It shows that you are fairly confident in your guess but not certain.
STRUCTURE
V普
だろう明日は晴れるだろう。
Ashita wa hareru darou.
It will probably be sunny tomorrow.
彼はもう帰っただろう。
Kare wa mou kaetta darou.
He probably already went home.
この問題は難しいだろう。
Kono mondai wa muzukashii darou.
This problem is probably difficult.
明日は雪が降るだろう。
Ashita wa yuki ga furu darou.
It will probably snow tomorrow.
彼は来ないだろう。
Kare wa konai darou.
He probably won't come.
だいたい三十分かかる。
Daitai sanjuppun kakaru.
It takes approximately thirty minutes.
毎日だいたい八時間寝る。
Mainichi daitai hachi-jikan neru.
I sleep approximately eight hours every day.
まだ仕事をしている。
Mada shigoto o shiteiru.
I am still working.
Example sentences
今のパーティーは午後７時からだろう？
Today's party is from 7 PM, right?
このケーキ、おいしいだろう？
This cake is delicious, right?
もう宿題は終わっただろう？
You've already finished your homework, right?
Practice exercises
1
今年の夏も暑いだろう。
This summer will probably be hot too.
Answer
だろう
2
あしたは晴れるだろう。
Tomorrow will be sunny, right?
Answer
だろう
3
あしたは雨が降るだろう。
It will rain tomorrow, right?
Answer
だろう
4
あしたは休みだろう。
Tomorrow is a day off, right?
Answer
だろう
5
あしたは休みだろう。
Tomorrow is a holiday, right?
Answer
だろう
6
試合は来週だろう。
The match is probably next week.
Answer
だろう
7
電車はもう出ただろう。
The train probably already left.
Answer
だろう
8
あの映画は面白いだろう。
That movie is probably interesting.
Answer
だろう