名词性从句中得虚拟语气当名词性从句(主语从句、宾语从句、表语从句和同位语从句)中得谓语动词使用了某种特别形式或者该从句使用了某些具有特定意义得名词、形容词或分词时,可以使用虚拟语气
1、 主语从句 (1) It is i m portant that she (should) cooperate wi th u s It w a s u n ne c essar y t h at h e (should) ge t her e s o ea r l y、 H e says i t is fo r tunate th a t sh e (should) take t h e f irst pr i ze、 It is stran g e t hat he (s hould) l ea ve wi th out telling u s、 I t is surprising/amazing/pleasing t h a t she(s h ould) win over her m other、在“i t + be + a d j、 + tha t c lause ”得句型中,形容词表示“必须得”、“重要得”、“适当得”、“自然得”、“不可能得”、“紧迫得”等意义时,主语从句常用虚拟语气
这类形容词还有 a d v i sa ble, d esi rab l e, ess e nt i al, impos s ible, n a t u ral, po s s i ble 等
形容词表示“惊讶得”、“失望得”、“后悔得”等意义时,主语从句常用虚拟语气
形容词是 dre ad fu l(可怕得),funny 等词时,这种句型中得主语从句也可用陈述语气
(2)It i s ord er ed t h at the cl a ssro o m (sh o u ld) be kept in