N4
といい
I hope, I wish, You should, It would be good
明日は学校に行きたくないな～、雪が降るといいな。
I don't want to go to school tomorrow. It would be great if it snows.
Explanation
「といい」 has 2 uses
1Wish: I hope …
「～といいね／といいな／といいんですが」: hoping that something you can't control turns out well.
試合で勝つといいですね。
I hope that you can win the game.
明日は学校に行きたくないな～、雪が降るといいな。
I don't want to go to school tomorrow. It would be great if it snows.
2Advice: you should …
「～といいですよ」: telling someone what they should do.
あなたはもっと果物を食べるといいです。
You should eat more fruit.
来週は締め切りなので、来週までに出すといい。
Next week is the deadline, so you should submit it by then.