分詞構文の作り方
１．When she arrived there, she found his car.

     　　従属節（副詞節）
　　　↓
２．Arriving there，she found his car.

　　　　副詞句

例文
１．時=when, while, after

While she was waiting for the bus, she was spoken to by a foreigner.

= Waiting for the bus,・・・

２．理由=as, because, since

As I was very tired, I fell asleep without taking a bath.

= Being very tired,・・・

As I didn’t know what to do, I was quite at a loss.

= Not knowing what to do,・・・

３．条件=if

If you turn to the left at the second corner, you’ll find the post office.

= Turning to the left at the second corner,・・・

４．譲歩＝though, although

Though I admit what you say, I still think you are wrong.

= Admitting what you say, ・・・

５．付帯状況「〜しながら」

He was driving, while he was listening to the radio.

=He was driving, listening to the radio.