[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 her in that way. 你不应那样批评她。
You needn't come tomorrow. 你明天没必要来了。
He dared not meet his fiancée. 他不敢见女朋友。
三、例题解析
1) 正确答案为A。由于情态动词can要求跟动词原形,所以B和C都不对,can后虽然有被动形式,但在意义上和语法上与横线后部分都无法衔接,所以D也错。
2) D错。改为develop。may后要求跟动词原形,而developing是现在分词,显然不符合要求,所以应改为develop。
3) A错。改用 must occur,此处叙说的是客观现象,而非强调正在发生的事,故用一般现在时。
4) B为正确答案。
5) B错。改为ought not to。
6) B为正确答案。
II 情态动词与完成时的使用
一、must+have+ED分词:用于肯定句,表示对过去情况的一种肯定推测,表示“肯定,一定”
1) It around nine o’clock when I drove back home because it was already dark.
[A] had to be
[B] must have been
[C] was to be
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