北京市2015届高考英语一轮复习 第22讲 情态动词与虚拟语气（上）2.doc

第22讲 情态动词与虚拟语气经典精讲（上） 开篇语 开心自测 开心自测讲解 题一： Maybe if I _______ science, and not literature then, I would be able to give you more help. A. studied B. would study C. had studied D. was studying 题二： I ______ sooner but I didn’t know that they were waiting for me. A. had come B. was coming C. would come D. would have come 题三： We _____ John’s name on the race list yesterday but for his recent injury. A. will put B. will have put C. would put D. would have put 题四： —Pity you missed the lecture on nuclear pollution. —I____ it, but I was busy preparing for a job interview. A. attended B. had attended C. would attend D. would have attended 主要考点梳理 情态动词 情态动词的语法特征 1） 情态动词不能表示正在发生或已经发生的事情，只表示期待或估计某事的发生； 2） 情态动词 除ought 和have 外，后面只能接不带to 的不定式； 3） 情态动词没有人称，数的变化，即情态动词第三人称单数不加-s； 4） 情态动词没有非谓语形式，即没有不定式、分词等形式。 比较can 和be able to can和could 表示能力；可能 (过去时用could), 只用于现在式和过去式(could)。be able to可以用于各种时态。 They will be able to tell you the news soon. 他很快就能告诉你消息了。 只用be able to a. 位于助动词后。 b. 情态动词后。 c. 表示过去某时刻动作。 d. 用于句首表示条件。 e. 表示成功地做了某事时，只能用was/were able to，不能用could。 He was able to flee Europe before the war broke out. = He managed to flee Europe before the war broke out. 注意：could不表示时态。 提出委婉的请求，（注意在回答中不可用could）。 　　—— Could I have the television on? 　　—— Yes, you can. / No, you can’t. 在否定，疑问句中表示推测或怀疑。 He couldn’t be a bad man. 他不大可能是坏人。 比较may和might 表示允许或请求；表示没有把握的推测； may 放在句首，表示祝愿。 May God bless you! He might be at home. 注意：might 表示推测时，不表示时态。只是可能性比may 小。 成语： may/might as well，后面接不带to 的不定式，意为“不妨”。 题一： If that is the case, we may as well try. Peter ___come with us tonight, but he isn’t very sure yet. A. must　 B. may　 C. can　 D. will 比较have to和must 两词都是“必须”的意思，have to表示客观的需要，must 表示说话人主观上的看法，即主观上的必要。 My brother was very ill, so I had to call the doctor in the middle of the night.　 我弟弟病得很厉害，我只得半夜里把医生请来。(客观上需要做这件事) He said that they must work hard. 他说