2016江西成考专升本英语情态动词归纳及练习汇总(3)

来源:
江西成考网
发布日期
2017年07月23日

摘要:  情态动词有can(能),may(可以),must(必须),have to(不得不),ought to(应该),dare(敢),used to(过去经常),had better(最好),would rather(宁愿)。在肯定句中它们后边都要接动词原形。在否定句中,can,may,must和dare后边加not;have to和ought to分别在have和ought后加not;used to的否定式可用used not to,也可用didn't use to,但后者用得较多;had

science is to discover how things are,not how they ought .

  [A] to[B] to be[C] be[D] have been

  5)You are quite right;I am inferring in my comments [A] that McGraw had not ought to [B] have broken [C] in the room without his permission [D] .

  7. dare 可以用作情态动词,后面跟不带to的动词不定式,这主要用于否定句中,它本身可有现在时第三人称单数,词尾加s,它还可以有ing分词形式(daring)和过去式及ed分词形式(dared)

  6)Although Oriental ideas of woman's subordination to man prevailed in those days,she meet with men on an equal basis.

  [A] did not dared [B] dared not [C] dared not to [D] did dare not to

  二、情态动词在一般时否定句中的用法

  can't(can not,cannot) 表示“不可能”,may not 表示“不可以”,mustn't(must not)表示“一定不要”,“不许可”,needn't (need not)表示“不必”,dare not +动词原形 表示“不敢”

  He can't finish his essay by this time. 现在他不可能写完论文。

  He may not sleep now. 他或许现在没在睡觉。

  You mustn't criticize h