中考英语复习情态动词课件

这是一份中考英语复习情态动词课件，共27页。PPT课件主要包含了什么是情态动词，can，may，must，could，had better，should，表示推测类，两个特殊记忆点等内容，欢迎下载使用。
·有一定的词义，但不能单独作谓语，必须和行为动词或系动词连用，构成谓语。
·无人称和数的变化（除have t区别）
·具有助动词的作用，可用来构成否定句，疑问句及用于简明答语。
头脑风暴----快速说出你知道的情态动词！
She must dislike such a man. Hw can that be true?The wman in the picture may be her sister.
must表示肯定是，用于肯定句can 表示可能，用于否定句，疑问句may表示可能，用于肯定句
must be ding
can’t be ding
may be ding
must have dne
can’t have dne
may have dne
must have been ding
can’t have been ding
may have been ding
Yu mustn’t smke in the hspital.Must I finish the hmewrk nw? --Yes, yu must. /Yes, yu have t. --N, yu needn’t. /N, yu dn’t have t.
mustn’t表示禁止。回答Must疑问句，肯定用must；否定用needn’t 或dn’t have t.
May I cme in nw?--Yes, yu may. /Yes, yu can. --N, yu mustn’t. /N, yu can’t.
may表示请求时，肯定回答用may，can；否定回答用mustn’t 或can’t。
二、表示义务类
Students must finish their hmewrk befre class.I have t g nw.Children shuld learn t respect thers.I need type this letter befre wrk.I need t type this letter befre wrk.
must:必须have t: 不得不shuld：应该need：需要
need 需要（情态动词、实意动词）have t 不得不
三、表示能力类
I can draw. = I am able t draw. I culd ride a bike when I was six years ld.
can:能，可以，相当于be able t
四、表示建议类
Yu shuld see a dentist. Yu had better nt g there by air. =Yu’d better nt…
shuld:应该had better:最好
五、几组容易混淆的词
must vs. have t
I must brush my teeth befre ging t bed.I have t g t see the dctr.
must 强调说话者的主观意愿，无人称，时态的变化；mustn’t表示禁止；have t强调客观上的必要性，常翻译为“不得不”，有人称和时态的变化。
can vs. be able t
She can sing the sng. Sme f the singers were able t sing English sngs as well as native speakers.
can表示能力，许可，建议，请求和可能性。只有can, culd两种形式。be able t表示在具体某件事上的能力，其形式主要靠be动词来变化，形式比can多。
ught t vs. shuld
Every citizen ught t perfrm military service.Yu shuld nt run alngside the swimming pl.
ught t侧重于表示按照法律，法规等规定，就强制意义的责任或义务。shuld含有个人意见，强调主观看法，语气比ught t稍弱。
It’s raining utside, yu’d better stay at hme.It’s very cld, yu had better nt g ut.
had better+动词原形，否定形式用had better nt+d，表示最好……
maybe VS. may be
She may be Lily’s mther. Maybe I’ll cme back in three days.
may 为情态动词后加be形成了推测；maybe是副词，意思为“大概，也许”，相当于perhaps，用于句首。
need VS. need
I need t type this letter befre three ’clck.I need clean my bedrm nw.
need后加t d，说明need是实意动词，用助动词变句式；need后加d，说明是情态动词，在need上变句式。
dare VS. dare
Mst peple hate Harry but they dn't dare t say s.Dare she risk staying where she was
dare后加t d，说明dare是实意动词，用助动词变句式；dare后加d，说明是情态动词，在dare上变句式。
写出下列情态动词的过去式
can maymustshallwillneed
wuld, shuld, culd, might等过去式有时不表示过去，而是表示更委婉客气的语气。