N5
でしょう
Right?, Probably, Isn't it?
イタリアは良かったでしょう。
Italy was great, wasn't it?
Explanation
「でしょう」 has 2 uses
1Probably
With a falling tone it is a guess: 「明日は雨でしょう」 (It will probably rain tomorrow). Weather forecasts use it a lot.
彼も踊るでしょう。
He will probably dance too.
今日の昼ごはんはハンバーガーでしょう。
Lunch today will probably be hamburgers.
2Right?
With a rising tone you check with the listener: 「田中さんでしょう？」 (You are Mr Tanaka, right?).
これはあなたの本でしょう？
This is your book, right?
イタリアは良かったでしょう。
Italy was great, wasn't it?
Mixed up with
After a noun or a な-adjective, drop 「だ」: not 「学生だでしょう」 but 「学生でしょう」.
Falling tone = your own guess; rising tone = asking the other person to confirm.
「でしょう」 is polite; the casual form is 「だろう」. To an elder, 「〜でしょうか」 is more polite than a confirming 「でしょう？」.