苏教版小学五年级英语语法归纳及语法练习情态动词一、can,(could过去式)1)表示能力(体力、知识、技能)
Canyouliftthisheavybox
(体力)Marycanspeakthreelanguages
(知识)Canyouskate
(技能)Can只有一般现在时和一般过去式;2)表示请求和允许
-----CanIgonow
-----Yes,youcan
/No,youcan’t
3)表示客观可能性(客观原因形成的能力)
They’vechangedthetimetable,sowecangobybusinstead
Thishallcanhold500peopleatleast
4)表示推测(惊讶、怀疑、不相信的态度),用于疑问句、否定句和感叹句中
Canthisbetrue
Thiscan’tbedonebyhim
Howcanthisbetrue
二.should,1)should,表示应该劝告、建议和命令
Ishouldhelpherbecausesheisintrouble
Youshouldgotoclassrightaway
ShouldIopenthewindow
3)表示推测Should(客观推测),must(主观推测)
Hemustbehomebynow
(断定他已到家)2
Heshouldbehomebynow
(不太肯定)(一)用适当的情态动词填空
MustIstandup
No,you________
________Ispeaksomething
Yes,you________
________Ileavetheparknow
No,you_________stayhere
Mygrandmotherisill
I_________stayathomeandlookafterher