成都考博輔導(dǎo)班

　　考博英語語法：虛擬語氣歸納和練習(xí)
　　(5)as, 或者whether…or…謂語多用be的原形，引導(dǎo)讓步虛擬從句，這種用法通常采用倒裝結(jié)構(gòu)：
　　Church as we use the word refers to all religious institutions, be they Christian, Islamivc, Buddhist, Jewish, and so on.
　　The business of each day, be it selling goods or shipping them, went quite smoothly.
　　(6)由連接詞in case, so that ,unless, lest ,for fear that引起的狀語從句中，謂語動詞要用虛擬形式，即should(might, would) 動詞原形，例如：
　　She put a blanket over the baby for fear that he should catch cold. 她在那個嬰兒身上蓋上了毯子以免他著涼。
　　The bad man was put in the soft-padded cell lest he injure himself.
　　(7) if it were not for…與現(xiàn)在事實相反， if it had not been for與過去事實相反，兩個都相當于but for：
　　If it had not been for his help(=but for his help),we would not have succeeded.
　　(8) 虛擬語氣用于as if(though)引起的方式狀語從句和表語從句中，其動詞形式與wish賓語從句的形式相同。