It is necessary that we should clean the room every day.(important, natural, strange, right, etc. )
It is a pity that you should be so careless. (shame, no wonder, etc.)
1. Past Perfect 2. would, could + Present Perfect
Would, could + v
你惨白的脸暗示你病了。 Your pale face suggests that you are ill. 我建议我们下个星期开个会。 I suggest that we （should） hold a meeting next week.
may/might+ not be/be doing/have done可能不 3.肯定句： must/may/could/might+ be/be doing/have done
4.mustn’t have done,can have done不可能存在
5.----Can the book be hers? ----Yes, it must be. No,it can’t be/it couldn’t be.
完形填空命题规律与高分技巧
一、测试目的
完形填空考试时间为15分钟，它是在一篇题材熟悉、 难度适中的短文（约200词）内流出20个空格（共10 分），每个空格为一题，要求考生从四个选项中选一个 最佳答案使短文的意思和结构恢复完整。选择项可以是 一个单词，也可以是短语，因此完形填空（Cloze Test） 也称短文填空或综合填空。它是一种测试考生综合运用 英语语言知识能力的一种题型，它集阅读理解能力与语 言应用能力考查于一体，考查考生在阅读理解基础上， 在一定语言情景下灵活运用词汇的能力。它首先要求考 生具备较强的阅读能力，具备能根据短文所给线索，捕 捉相关信息，进行分析判断、逻辑推理的能力，它还要 求考生能熟练运用所学词汇、语法、习惯用语及交际用 语等语言知识进行填词，考查了使用语言的准确性
SUBJUNCTIVE MOOD
Reason (adj.)
Vegetable Animal Flower Fruit Car City
……
Cabbage… Dog… Rose… Apple… BMW.. Shanghai…
......
Simple… Cute… Romantic… Lovely… Elegant… Modern…
2. insist; order,
（should）
command; suggest， +动词原形
advice, propose;
require, ask, demand,
request,
一个坚持，两个命令
三个建议，四个要求
我的建议是我们去北京渡寒假。
My suggestion is that we should go to Beijing for our winter vacation.
看看时间（时钟）！我们该回家了。 Look at the clock! It’s time we went home.
虚拟语气用于定语从句
It is (high) time that + Past Tense It is time that the baby went to bed.
其他用法
if only则表示“但愿”，"如果……就好了"，用法与wish基 本相同。
要是闹钟响了该多好啊！
If only the alarm had rung.
1.Few people may have heard of him.
2.He must have disliked it,because he left. 3.You may have to spend houres in the queue 4.His paintings might not come this way again
can’t/couldn’t have done（不可能） 表示对过去的行为的怀疑和不肯定， 通常用在否定句和疑问句中。
23
1. He may not have finished the exercises, I’m afraid. 2.Jane can’t find her purse.Someone might have stolen it. 3.She is usually careless.She may not have turned off the light.
2.may/might be/be doing 表示对现在/将来状态或正在进行的动作可能推测
1）——I wonder why Tom hasn’t answered my letter.
——He may/might be ill.
2)He may be doing his homework now. Please don’t call him.
may/might (not) have done或许/可能做 用来推测过去可能发生过某种情况
(用于肯定或否定句中)
Modal verbs+be adj./n.
Modal verbs+be doing 表示对现在/将来状态或正在进行情况推测
1.must be/be doing：表示对现在/将来状态或正 在进行的动作肯定推测(用于肯定句中) 1）--I had no sleep for about 48 hours
......
e.g.: -If I were a vegetable, what vegetable would I be?
-If you were a vegetable, you would be a cabbage. Because you are simple.
1.如果明天下雨，我们就不出去。（明天下雨的可能性不大）
If it rained/should rain/were to rain tomorrow, we shouldn’t go out. 2. 如果他在这儿，他会帮你的。
If he were here, he would (could, might, should) help you.
虚拟语气在非真实条件状语从句中
1）——Can I have some sweets? ——You can’t/couldn’t be hungry.
You have just had dinners.
2) —— Can he be sleeping? —— No, he can’t be sleeping.
总结
1.疑问句:Can/Could+be/be doing/have done 2.否定句: can’t/couldn’t+ be/be doing/have done不可能
It is requested that Miss Liu should give a performance at the party.(suggested, decided, ordered, proposed, etc)
注： 此种从句若表示惊奇的情感则 用虚拟语气，否则也可以用陈述语 气。
It is a pity that you didn’t come.
3)I don’t know where professor Brown is. He may be in his garden, watering the flowers.
3.can’t/couldn’t be/be doing表示对现在 /将来状态或正在进行的动作肯定推测用于 否定句中， Can/Could …be/be doing用于疑问句中
我希望昨晚能和你一起去(wish)。 I wish I could have gone with you last night.
虚拟语气用于宾语从句
1. Wish Indicative Subjunctive
Present Present Past (be-were)
Past
Past
Future Will…
--You must be exhausted. 2)Judging by your behaviour,you must be a doctor. 3)The police are stopping all cars. They must be looking for the escaped prisoner.
+ have done
+ be doing
可能的推测
may, might
否定的推测
条件句
主句
与过去事 Had done 实相反
Would have done
与现在事 过去式
Would do
实相反 （Be 用 were）
与将来事 实相反
过去式 （Be 用 were） Should do Were to do
Would （could, should, might). do
虚拟条件句的倒装 虚拟条件句的从句部分含有were, should, 或had时, 可省 略if，再把were, should或had 移到从句的句首，实行倒 装。
如果你来得早些就能碰到他了。 （请使用倒装） Had you come earlier, you would have met him.
虚拟语气在含蓄条件句中的应用
otherwise, or… 谢谢你的帮助，否则我们的试验无法成功。（otherwise）
Thank you for your help, otherwise we wouldn’t have succeeded in the experiment.