24．It is required that the students do/do not use mobile phones in their school, so seldom
shouldwill you see them using one.
解析 句意：学生被要求在学校不能使用手机，所以您几乎看不到他们用。根据required可知，从句谓语动词用“(should＋)动词原形”。
25．I forget where I read the article, or I
∧ show it to you now. would
解析 句意：我忘记在哪读过这篇文章了，否则我现在就指给你看了。根据语境可知，or 隐含有一个虚拟的条件，即 or＝if I didn't forget where I read the article(要是我没忘记我在哪儿读过这篇文章的话，但事实上忘了)，故用“would＋动词原形”表示对现在事实的虚拟。
26．If it were not for the fact that she couldn't sing, I would invite her to the party.
can't解析 句意：如果不是因为她不能唱歌，我就邀请她来晚会了。根据if从句的谓语动词were可知，这是对现在情况的虚拟；for the fact说明的是“客观事实”，描述客观事实用一般现在时。
27．I'd rather we don't see each other in the future and I'm sure you know the reason.
didn't解析 句意：我宁愿我们今后不再见面，我确信你知道原因。would rather若是对将来情况的虚拟，从句用一般过去时。
28．John's grade on the test is the highest in his class. He should have studied last night.
must解析 句意：约翰考试的分数最高，他昨晚一定学习了。从last night可判断，他昨晚一定学习了，must have done表示对过去情况的肯定推测。
29．Would you ∧ bought the dictionary if you had had more money yesterday?
have解析 句意：如果你昨天有更多的钱，你会不会买那本字典呢？根据if you had had可知，句子是对过去情况的虚拟，would引导的疑问句中应用“have＋过去分词”。
30．Bob would ∧ helped us yesterday, but he was busy.
have
解析 句意：鲍勃昨天本应该帮助我们的，但是他太忙了。根据but可知，句子是对过去事实的虚拟，故上半句谓语动词用would have helped。
高考英语语法情态动词和虚拟语气讲解练习含答案
