as,引導的倒裝句
as 引導的讓步從句必須將表語或狀語提前（名詞，形容詞, 副詞, 分詞, 實義動詞提前）。
Old as they were, they stuck to working. 雖然他們年紀大了，還在堅持工作。
Pretty as she is, she is not clever. 雖然她漂亮，但不聰明。
Tired as he was, he worked late into the night.雖然他累了，但還是工作到深夜。
Hard as he tried, he couldn"t lift the stone.
雖然他很努力地嘗試了，但是還是沒有搬動那石頭。
Young as he is, he knows a lot. 雖然他年輕，卻知道很多東西。
但需注意：
1） 句首名詞不能帶任何冠詞。
例如：Child as he is, he speaks English very well
2） 句首是實義動詞, 其他助動詞放在主語後。如果實義動詞有賓語和狀語，隨實義動詞一起放在主語之前。
例如：Try hard as he will, he never seems able to do the work satisfactorily. 他工作很努力，但總不能讓人滿意。
注意：讓步狀語從句中，有though，although時，後面的主句不能有but，但是 though 和yet可連用。
as,引導的倒裝句
as 引導的讓步從句必須將表語或狀語提前（名詞，形容詞, 副詞, 分詞, 實義動詞提前）。
Old as they were, they stuck to working. 雖然他們年紀大了，還在堅持工作。
Pretty as she is, she is not clever. 雖然她漂亮，但不聰明。
Tired as he was, he worked late into the night.雖然他累了，但還是工作到深夜。
Hard as he tried, he couldn"t lift the stone.
雖然他很努力地嘗試了，但是還是沒有搬動那石頭。
Young as he is, he knows a lot. 雖然他年輕，卻知道很多東西。
但需注意：
1） 句首名詞不能帶任何冠詞。
例如：Child as he is, he speaks English very well
2） 句首是實義動詞, 其他助動詞放在主語後。如果實義動詞有賓語和狀語，隨實義動詞一起放在主語之前。
例如：Try hard as he will, he never seems able to do the work satisfactorily. 他工作很努力，但總不能讓人滿意。
注意：讓步狀語從句中，有though，although時，後面的主句不能有but，但是 though 和yet可連用。