賓語從句和表語從句都屬于名詞從句,用于表示建議、規(guī)勸、要求、命令等的名詞從句使用虛擬語氣目的是緩和讓人非得接受的強(qiáng)硬感覺,言外之意告訴他人這只是主語的個(gè)人見解罷了,聽不聽全在自己.名詞從句的虛擬語氣包括下列三種：
一、主句中有 advise/advice,mind,suggest/suggestion,demand,request,insist/insistence,order,propose/proposal 等表示動(dòng)詞或名詞,從句動(dòng)詞需要用 should do 或者干脆省去 should 直接用動(dòng)詞原形表示,如：
賓語從句：
-- I suggested that we (should) hold a meeting tinight.
-- The chaiman proposed that we (should) discuss the question.
主語從句：
-- It is his insistence that the matter (should) be put to vote at once.
-- It is my suggestion that we (should) hold a meeting tinight.
表語從句：
-- His insistence is that the matter (should) be put to vote at once.
-- My suggestion is that we (should) hold a meeting tinight.
二、在 it is ...that 中,如果表語是 important,neccessry,strange 等表示主語個(gè)人見解的形容詞時(shí),主語從句也要虛擬,用（should）do 作謂語動(dòng)詞,如：
-- It is quite natural that he (should) think so.
-- It is strange that he have gone away without telling us.
三、wish,had better,would rather 和 it is time 后的從句也要用虛擬,但是謂語動(dòng)詞與條件虛擬的動(dòng)詞一致,如：
-- I wish I were young again.但愿我還年輕/我要是回到年輕時(shí)代就好了.
-- He'd better you would come tomorrow.他倒希望你明天回來.
-- They would rather you had come to our party then.他們寧愿你那時(shí)來參加聚會(huì).
-- It's high time that you had got up.你早就該起床了.