在表示建議、命令、要求、忠告等動詞的后面的賓語從句中的虛擬語氣
    由于這些動詞本身隱含說話者的主觀意見，認為某事應該或不應該怎樣，這些詞語后面的“that”從句應用虛擬語氣，且均以“should+動詞原形”表示這種語氣，但事實上“should”常被省略，故此從句中謂語動詞用原形，常用的此類動詞有：
    表示“要求”的：ask, desire, request, demand, require, beg
    表示“提議、勸告、建議”的：move, prpose, suggest, recommend, advise, vote
    表示“決定、命令”的：decide, order
    表示“主張”的：maintain, urge
    表示“同意、堅持”的：consent, insist
    例如：
    1.The doctor suggested that he (should) try to lose his weight.
    2.He insisted that we (should ) tell him the news.
    3.When I suggested that he try shaving cream, he said, “The razor and water do the job. ”(當我建議他用刮胡膏時，他說“剃刀和水就行了”。)
    4.He pursued various theories for several days until I suggested we take the toy apart to see how it did work. (他費了幾天功夫尋找理論根據，直到我建議拆開看看它是如何轉動的。)
    5.One can suggest that students should spend two or three years in an Englishspeaking country. (我們建議學生應在說英語的國家呆上兩三年。)
    在表示命令、建議、要求等一類動詞后面的從句中虛擬語氣很普遍，其結構如：
    order, suggest, propose, require, demand, request, insist, command, insist +... (should) do
    6.I suggest that we (should) hold a meeting next week.
    7.He insisted that he (should ) be sent there.
    但注意：在insist 后的從句中, 如果是堅持自己, 用陳述語氣, 堅持別人做什么事情, 用虛擬語氣.
    8.she insists that she is right.
    9.she insisted that I should finish the work at once.
    或者說，suggest, insist不表示建議或堅持要某人做某事時，即它們用于其本意暗示、表明、堅持認為時，賓語從句用陳述語氣。
    10.The guard at gate insisted that everybody obey the rules.
    判斷改錯:
    (錯)11.　You pale face suggests that you (should) be ill.
    (對)12.　Your pale face suggests that you are ill.
    (錯)13.　I insisted that you ( should) be wrong.
    (對)14.　I insisted that you were wrong.