The firm now hopes to work with human volunteers, perhaps as early as next year should America’s Food and Drug Administration play along.
为何后半句要倒装？是由于as吗？是副词+as的结构致使的让步状语部分倒装吗？可是副词没在句首呀？
The firm now hopes to work with human volunteers, perhaps as early as next year should America’s Food and Drug Administration play along.
should America’s Food and Drug Administration play along
= if America’s Food and Drug Administration should play along. 修饰不定式to work
if 引导的条件句假如含有were, had 或 should, 可以省略连词if，将were, had 或 should 倒装于主语之前。
