上海高考英语语法复习13情态动词.pptVIP

情态动词 英语语法复习十三 情态动词的基本用法： 1．can/could 可表示______；如：Two eyes can see more than one. 可表示______；如：Can/Could it be true? 可表示_______；如：Can/Could you lend me some money? 2．may/might 可表示______；如：May you succeed！ 可表示______；如：May I come in?（might是_____________用法） 可表示_______；如：He may be at home. 3．must 可表示_________；如：I must be off now. 可表示_________；如：You must be a teacher. mustn’t 表示_________；如：You mustn’t play in the street. 4．should/ought to可表示______，也可表示______；如：It’s 6 o’clock now. He should be at home. 5．will/would will 可表示________和_________；如：I will never do that again. would 可表示___________；如：During the vacation he would visit me every week. 6．shall 可表示________，用于________人称；如：Shall I close the door? 可表示说话人给对方的______，______，_____，用于________人称； 如：You shall fail if you don’t work harder. / He shall have the book tomorrow. 7．need/dare 既可作______动词，也可作______动词。need 表示______，dare 表示______ 作为情态动词，need________（有/没有）过去时，dare过去时为__________ 比较与辨析： 1）can/could与be able to can表示__________________ be able to表示______________ 表示“_______________________”要用was/were (not) able to，而不用could (not)。如：He worked hard, but he wasn’t able to pass the exam. 2）can’t与may not can’t表示______，may not表示______。 如：He can’t be at the office now. He may not be at the office now. 3）must和have to ① I must study hard. 表示___________ I have to study hard. 表示_____________ ② You mustn’t go. 表示___________ You dont have to go. 表示____________ 4）would, used to都可表示“过去习惯做”。区别在于： ① would表示过去习惯性的动作，但___________（涉及/不涉及）与现在情况的对比。如：He would walk by the river in the morning. 注意：would后不能跟_________动词。如不能说He would be late for school last year. ② used to表示过去习惯性的动作或状态，这种习惯现在_________（依然存在/已不存在）。 如：He used to get up early. He used to be late for school. 5）should的特殊用法： ① I can’t imagine why this should happen to me. __________ ② Should I be free tomorrow, I will come. ______________ 6）had better, would rather ① had better ________________ 最好做/不做某事 ② would rather ______