3.用于“形容词(或名词、动词)+as(though)引导的让步状语从句中。例如:Pretty as she is ,she
is not clever. Try as he would, he might fail again.
注意:1)在用as(though)引导的让步状语从句中,如果主语较长,也可实行全部倒装。例如:Difficult as was the
chemistry homework, it was finished in time.
2)如果从句的表语是名词,其名词前不加任何冠词。例如:
Child as he was, he had to make a living.