(4)lest/for fear that/in case 從句謂語用(should+)動詞原形。如：
The mad man was put in the soft-padded cell lest he injure himself.
(5)whether…or…有時謂語用be的原形，引導讓步虛擬從句，這種用法經(jīng)常采用倒裝結構。如：
Church as we use the word refers to all religious institutions, be they Christian, Islamic, Buddhist, Jewish, and so on.
The business of each day, be it selling goods or shipping them, went quite smoothly.
