would

如果我有更多时间，我会学一门新语言。

If I had more time, I ___would learn a new language.

他对我说他想尽快回来。

He said to me he ___would like to come back soon.

能加入你和你的朋友一起去山里就太好了。

It ___would be great to join you and your friends in the mountains.