のに
(Noni)
Expresses contrast or unexpectedness, often with a feeling of regret or dissatisfaction.
Connection rules
- +Verb/i-Adj (Plain form) + のに
- +na-Adj/Noun + な + のに
Examples
1.
一生懸命勉強したのに、試験に落ちました。

Isshoukenmei benkyou shi ta noni, shiken ni ochi mashi ta.
Even though I studied hard, I failed the exam.
「Disappointment after grades」
2.
日曜日なのに、仕事をしなければなりません。

Nichiyoubi na noni, shigoto wo shi nakere ba nari mase n.
Although it is Sunday, I have to work.
「Working on the weekend」
Practice
Even though it's Sunday, I have to work.
___、仕事をしなければなりません。
Romaji also accepted