语法情态动词.docx
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语法情态动词
情态动词
1.什么是情态动词本身有词义,要加动词原形一起构成谓语,表达是一定语气
Can/MayIcomein?
Yes,youcan/may.
No,youcan’t.
2.情态动词有哪些:
must,shall,should,will,would,may,might,can,could,need,dare
Youmustarriveatschoolearlier.
3.MustIturninmyhomework?
Yes,youmust.
No,youneedn’t.
Youmustn’tplayfootballinthestreet.
4.情态动词特殊用法:
a.can疑问句,否定句表示可能性
Canitbetruethat…?
itcan’tbetrue
b.must偏偏
ThetelephonemustringwhenIwasabouttogoout.
c.would过去常常
和usedtodo区别
Iusedtogetuplate.(nowIgetupearly.)
WhenIwasinFrance,Iwoulddrinkafternoontea.
d.may祝愿
Mayyousucceed!
e.shall一三人称疑问句请求对方允许
shallwe
二三人称肯定句命令、允诺、威胁、请求等语气
Mymotherpromisedthatsheshallbuymeabicycle.
f.should竟然
It’shardtoimaginethatagentlemanshouldberudetoalady.
I’msodisappointedthatyoushouldgetsuchalowmark.
g.would,could语气委婉
Wouldyouliketohaveanothercupoftea?
Couldyoupleasepassmethesalt?
Ican/will.
5.情态动词表推测
肯定推测现在:
mustdo/be过去:
musthavedone
Hemustbeinthelibrarynow,isn’the?
Heisinthelibrary.
Hemusthaverecitedthetranslationslastnight,didn’the?
Herecitedthetranslationslastnight.
HemusthavebeeninSHforages,hasn’the?
HehasbeeninSHforages.
否定推测现在:
can’tdo/be
Hecan’tbeinthelibrary.
过去:
can’thavedone
可能性的推测现在:
may/mightdo/be
Hemaybeinthelibrary.
may/mighthavedone
shouldhavedone应该做某事没有做(责备)
needhavedone有必要做某事没有做
couldhavedone本可以做某事没有做
6.dare,need既可作情态动词,又可作行为动词
daredo否darenotdo
daretodo否don’tdaretodo
sthneed/want/requiredoing=tobedone
7.will=bewillingto
8.oughtto=should=besupposedtohavedone应该做某事没有做
9.dressupasSantaClaus/FatherChristmas装扮成圣诞老人
10.成功做某事managedtodo=succeededindoing=was/wereableto
11.Beoutofcontrol失控
bringsb./sth.undercontrol控制住
12.成功做某事succeededindoing=managedtodo=was/wereableto
13.sbbetoblameforsth.某人该为某事负责
Thedriveristoblameforthetrafficaccident.
14.regrettodo遗憾
regretdoing后悔
15.haveanappointmentwithsb.和某人有约date
16.will=bewillingto愿意
17.Thedoorwon’topen.