At a glance
～といい expresses a hope: "I hope ~" or "it would be nice if ~". With よ at the end, it usually gives advice instead: "it's a good idea to ~".
[plain non-past form] + といい (です) (ね / な / なあ / よ)
明日、晴れるといいですね。 I hope it's sunny tomorrow.
How to form it
といい attaches to the plain non-past form. Nouns and な-adjectives need だ.
| Attaches to | Form | Example | Meaning |
|---|---|---|---|
| Verb | Dictionary form | 晴れるといい | I hope it's sunny |
| Verb (potential) | Potential form | 合格できるといい | I hope (you) can pass |
| Verb (negative) | ない-form | 雨が降らないといい | I hope it doesn't rain |
| い-adjective | ～い | 暖かいといい | I hope it's warm |
| な-adjective | ～だ | 元気だといい | I hope (they're) well |
| Noun | ～だ | 休みだといい | I hope it's a day off |
| Register | Ending |
|---|---|
| Polite | ～といいですね / ～といいですよ |
| Casual | ～といいな / ～といいなあ / ～といいね |