中考英语专题情态动词课件.ppt

1、 本身有一定的词义，表示说话人的情绪、态度或语气的动词。定义常用词 can(could),may (might),must,shall (should),will(would),had better,have to,need 等。I can sing very well.She can dance beautifully.用法与特点1.有一定的词义，但并不完整，必须与实义动词一起构成谓语。2.后接动词原形，即不带to的不定式。She may lose her way in the village.You must do it now with his help.3.无人称和数的变化。We mu

2、st stay here at this time.He must stay here at this time.4.具有助动词作用，可以用来构成否定句，疑问句及用于简单回答。We cant carry the heavy box.Can you sing an English song?Yes,I can./No,I cant.（否定句）（疑问句）（简单回答）特殊用法1.以May开头的一般疑问句，否定回答常用mustnt。May I dance here after dinner?No,you mustnt.（否定回答）2.以 Must开头的一般疑问句，否定回答常用neednt/dont h

3、ave to。Must I read books every day?No,you neednt./No,you dont have to.（否定回答）3.情态动词表推测。He may know the answer to this question.It is cold in the room.They must have turned off the heating.(1)在肯定句中一般用must(一定),can/could(可能),may/might(也许,或许)。It cant be the headmaster.He has gone to America.He will be ba

4、ck in two weeks.He may not know the scientist.Im not sure.(2)在否定句中用cant/couldnt(不可能)，may not/might not(可能不)。易错警示易错警示_ she_ her uniform to school today?A.Need;wear B.Does;need wear C.Does;needs wear D.Need;wears【点拨】need作实义动词时，有两种用法：1.need to do sth.需要做某事 2.need doing sth.需要被做某事（=need to be done sth.）

5、；作情态动词时，后加动词原形，通常只用于疑问式或否定式。【答案】A易错警示易错警示Could I come later tomorrow?Yes,you _.A.can B.could C.do D.cant【点拨】could也可表示请求，语气委婉，主要用于疑问句，不可用于肯定句，肯定回答应用can，否定回答可用No,Im afraid not.【答案】A高频考点高频考点Is that Mr.Zhou?It _ be him.He has gone to Beijing.A.mayB.canC.cant D.mustnt（海南中考改编）解析：解析：考查情态动词表推测的用法。由答语He has

6、gone to Beijing“他去北京了”，可推断那个人不可能是周老师，表示否定推测。答案：答案：C Must I finish reading the book today,Mr.Brown?No,you _.You can finish it in two days.A.neednt B.mustnt C.cant D.couldnt（黄冈中考）解析：解析：考查情态动词的使用规则。句意：布朗先生，我必须今天看完这本书吗？不，你不必。你可以在两天之内看完这本书。must引导的一般疑问句，否定回答用neednt，意为“不必”。答案：答案：AThe boys can play chess in

7、 the afternoon.（改为否定句）The boys _ chess in the afternoon.（重庆中考）cant play解析：解析：考查含有情态动词的否定句形式。句意：男孩子们下午可以下象棋。can“能；会；可以”是情态动词。含有情态动词的肯定句改为否定句时直接在情态动词后加not。答案：答案：cant playYou should _(道歉)to her for your mistake.（柳州中考）apologize解析：解析：考查情态动词的用法。句意：你应该为你的错误向她道歉。should“应该”是情态动词，后加动词原形。“道歉”动词的英语表达是apologize。答案：答案：apologize