作条件状语 Turning to the left, you will find the school. (=If you turn the left, …) If you work hard, you'll succeed. =Working hard, you'll succeed. 作让步状语 1. Working hard as he did, he was still unable to support the whole family. 2. Knowing where I live, he never comes to see me. =Though he knows where I live, he never comes to see me.