虚拟条件句的倒装
虚拟条件句的从句部分如果含有were、should、或had可将if省略,再把were、should或had移到从句句首,实行倒装。
Were they here now, they could help us.
=If they were here now, they could help us.
Had you come earlier, you would have met him
=If you had come earlier, you would have met him.
Should it rain, the crops would be saved.
=Were it to rain, the crops would be saved.