高考英语语法破解与练习动词与情态动词课件

高中英语语法之情态动词（一)情态动词的定义:情态动词表示说话人对某一动作或状态的态度。

（二）情态动词的特点:1)有一定词义；2）不受主语人称和数的变化影响；3)与主要动词的原形（或称不带to的不定式）一起构成谓语（除ought to作固定词组看待)。

情态动词无人称和数的变化, 情态动词后面跟的动词需用原形，否定式构成是在情态动词后面加”not"。

个别情态动词有现在式和过去式两种形式，过去式用来表达更加客气, 委婉的语气，时态性不强, 可用于过去,现在或将来。

情态动词属非及物动词,故没有被动语态。

He could be here soon。

他很快就来。

We can’t carry the heavy box。

我们搬不动那箱子。

除此之外，情态助动词还有如下词法和句法特征：1）除ought和used以外，其他情态动词后面只能接不带to的不定式.We used to grow beautiful roses. I asked if he would come and repair my television set.2）情态助动词在限定动词词组总是位居第一： They need not have been punished so severely。

3）情态助动词用于第三人称单数现在时的时候,没有词形变化,即其词尾无—s形式：She dare not say what she thinks。

4）情态动词没有非限定形式，即没有不定式和分词形式，也没有相应的动名词：Still， she needn't have run away。

5）情态助动词的“时”的形式并不是时间区别的主要标志。

在不少场合,情态助动词的现在时和过去时形式都可以表示现在、过去或将来时间：Would you mind very much if I ask you to do something？ She told him he ought not to have done it。

第3讲　情态动词和虚拟语气内容索引010203情境导入考点解读技法图解04考点达标检测1.情态动词Lucy is an outgoing lady.She can①play many kinds of musical instruments.Actually,she could② play the piano when she was 8 years old. Lucy also keeps taking exercise every day.She says that she has to③ do some sports because she must④ keep slim.“You shall⑤ get fat soon if you don’t take exercise every day.” She usually says to her friends.As for her,an elegant lady should⑥try to keep fit.However,last week,she found that she might⑦ put on weight and she was worried and decided to lose weight.And these days she is always thinking that she may⑧ succeed soon if she tries all her best.However,she is always lacking in time because she ought to⑨ take care of her children.One night after supper,she walked quickly in order to go dancing at the Tomorrow Park but she was late.On her way,she thought that the dancing must have begun⑩,and the coach could have taught or shown⑪ many new moves. She was afraid that her friends might have left⑫ before she got there.She was regretful then.She should have had⑬ supper earlier,or she could have taken⑭a taxi,and indeed she needn’t have taken⑮ a bath in advance.When she reached the park finally,she found nobody was there.She remembered suddenly that it had been reported on the radio that there would be a heavy rain that night.用法感悟1.①can 和句②could 表 ,意为“ ”。