Question

県民

下記の問題を教えてください。
よろしくお願いします。

3 分詞構文の意味を考えて, 次の各文を接続詞を用いて表しなさい。
1)
Returning home, he found her to be out.
2) My brother, being sick, stayed in bed all day long.
3) Walking in the park, I saw a bird building a nest.
4) Not having received an answer, I called him again.
5) Having prepared for tomorrow's class, he watched TV.