1) Knowing English well he translated the article without a dictionary. причастием
2) He took part in the sittings. отглагольным существительным
3) She is looking at the woman sitting at the window. причастием
4) After saying this he left the room. герундием
5) Have you any reason for saying such things? герундием
6) The reading of this book took two hours. отглагольным существительным (хотя кое-кто считает его герундием с определённым артиклем)
7) He sat in the arm-chair reading a newspaper. причастием
8) My little son shows his enjoyment by crying. герундием
9) The crying child was comforted by his nurse. причастием
10) She stopped crying, looked up, said nothing. герундием