- As he entered the room, I was reading a book on a chair.
- They arrived as we were leaving.
- He sat watching her as she got ready.
［原因・理由：～なので］
- As he was tired, he didn't go there.
- She may need some help as she's new.
- I went to bed at 9 pm as I had a plane to catch at 6 am.
［様態：～の様に］
- Leave it, as it was.
- Do as I say, not as I do.
- As you know, Kei is leaving soon.
- We are very happy for you to stay at our house as long as you like.
- Your jacket is the same colour as mine. ［比較と捉えることも可］
［比例・比較：～につれて、～と比べて］
- As time goes by, he became more selfish. ［比例］［by＝副詞：通り過ぎて］
- As the show increases in popularity, more and more tickets are sold daily. ［比例］
- She arrived early, as I expected. ［比較］
［譲歩：～だけれども］
- Happy as they were, there was something missing.
- Much as I sympathize with your difficulties, there is little I can do to help you.
- Tired as he was, he went on working.
※その他にも、前置詞や副詞としても機能する。
課題 #04
→ 文法 #75 as の用法（副詞 / 前置詞 / 接続詞 / 関係代名詞）
