もし休む機会があれば、彼は元気を取り戻すために8時間眠るでしょう。

If he had the opportunity to rest, he would sleep for eight hours to regain his strength.

もし疲れていたら、一晩中眠るでしょう。

If you were tired, you would sleep through the entire night.

長い仕事の一日の後、自然の静けさの中で休むために星の下で眠るでしょう。

After a long day at work, I would sleep under the stars, relaxing in the silence of nature.