Unit 6 Electricity everywhere Section 2 Grammar 课件 沪教版七年级下册（含音频+视频）.pptxVIP

Unit6Electricityeverywhere;understandwhyelectricityisimportant.

explaindifferentwaysofproducingelectricity.

observesafetyrulesforusingelectricity.

talkabouthowtosaveelectricity.;Leadin;Modalverbs情态动词;Modelverbs情态动词

Modalverbs:canandcannot,mayandmaynot,mustand

mustnot;Presentation;Benny:Right.Mumtoldmewemustn’tgooutdoorsduringastorm.It’sdangerous.

Daisy:Yes,that’sright.However,youcanproduceelectricitysafelybyrubbingaruleragainstyoursweater.Lookatme!

Benny:Wow.That’sfun!MayItry?

Daisy:Yes,ofcourse.Butyoumustgiveitbacktomebecauseit’smyfavouriteruler!;Acanandcannot;情态动词can的用法;PetercanspeakEnglish.

否定→Petercan’t/cannotspeakEnglish.

一般疑问句→CanPeterspeakEnglish?

（一般疑问句，提前情态动词）

特殊疑问句→WhatcanPeterspeak?

⑤could是can的过去式，但表示请求许可时，could和can不表示时态的区别，只是could的语气更加委婉，用could提出的请求要用can来回答。

;Agame:

whatwouldyousay?;1.Amanisgoingtoseehisboss.Heisstandingatthedoorway.;2.Astudentisgoingtoasktheteacheraquestion.;3.Aboyisthirsty.Heisaskinghismotherforsomething.;4.Ashopassistantisservingacustomer.;Wow.That’sfun!MayItry?

Yes,ofcourse.Butyoumustgiveitbacktomebecauseit’smyfavouriteruler!

Youmay/canturnontheTV.

Youmaynot/cannotplayinthekitchen.;情态动词may的用法;②否定式：maynot意为“不可以”。

③may构成的一般疑问句及其回答形式如下：

MayI...?

（肯定回答）Yes,youmay/can.

（否定回答）No,youmaynot/can’t/mustn’t.

（注：mustn’t的语气最强，表示禁止）;Daisyisnotfeelingwelltoday.Bennyisathomewithher.Readtheirconversationbelow.Fillintheblankswithmayorcan.;Benny:Howareyoufeeling,Daisy?

Daisy:Notverywell.

Benny:(1)_________Igetyouachair?

Daisy:Yes,thanks.

Benny:I’mgoingout.(2)_______Iborrowyourbicycle,

Daisy?

Daisy:Yes,youmay.Beforeyougotomeetyourfriends,

canyoucomeandseethedoctorwithme?

Benny:Yes.I(3)_____.(4)______Icarryyourbagforyou?

Da