Mimi Kara Oboeru N4 Grammar: 15. ~だろう / （~だろう）と思う
Translated from the Vietnamese original. View the original.
Mimi Kara Oboeru N4 Grammar: 15. ~だろう / （~だろう）と思う
Here is Japanese N4 grammar study material taken from the Mimi Kara Oboeru N4 textbook.
~だろう / （~だろう）と思う
1. Meaning: Guessing, judging, estimating, supposing…
2. Structure: Noun / [い-adjective / な-adjective / verb] plain form.
However, with な-adjectives drop だ。
今月はケータイをよく使ったから、きっと電話代が高いだろう。
Kongetsu wa kētai o yoku tsukattakara, kitto denwadai ga takaidarou.
I used my mobile phone a lot this month, so the phone bill will surely be high.
リンさんは今日、病気で学校を休みました。多分、あしたも来ない（ / 欠席）だ ろうと思います。
Rin-san wa kyō, byōki de gakkō o yasumimashita. Tabun, ashita mo konai ( / kesseki)da rō to omoimasu.
Rin was off school today because of illness. I think she probably will not come to class tomorrow either.
先生は何歳ぐらいだろうか、たぶん、３５歳ぐらいだろう。
Sensei wa nan-sai guraidarou ka, tabun, 35-sai guraidarou.
I wonder how old the teacher is. Probably about 35.
3. Note: The formal version of だろう is でしょう.
（天気予報）「あしたは晴れるでしょう」
(Tenkeyohō) `ashitahaharerudeshou’
(Weather forecast) Tomorrow will probably be fine.
「あのおばあさん、若いころはきっときれいだったでしょうね」
`Ano obāsan, wakai koro wa kitto kireidattadeshou ne’
That old lady must have been very beautiful when she was young.