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初三英语《Unit9Whenwasitinvented》PPT课件.ppt

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welcometomyclass
Unit9
SectionAPeriod1
Whatarethey?
TheyarefourinventionsofChina
gunpowder
papermaking
printing
welcometomyclass
Unit9
SectionAPeriod1
Whatarethey?
TheyarefourinventionsofChina
gunpowder
papermaking
printing
compass
Whenwasthelightbulbsinvented?
Whowasthetelephoneinventedby?
lightbulbs
Itwasinventedin1880.
ItwasinventedbyEdison.
1880Edison
Makealistofinventionsyouknow.
WhenwastheTVinvented?
Whowasthealarmclockinventedby?
Itwasinventedin1788.
ItwasinventedbyEric-ShaShuWa
alarmclock
Eric-ShaShuWa(埃里克·沙舒瓦)
1788
BillHewlett1971
calculator
calculator
calculator
calculator
calculator
WhenwastheTVinvented?
Whowasthecalculatorinventedby?
Itwasinventedin1971.
ItwasinventedbyBillHewlett
Whenwasthecomputerinvented?
Whowasthecomputerinventedby?
1976Cray
Itwasinventedin1976.
ItwasinventedbyCray
computer
Whenwasthecarinvented?
Whowasthecarinventedby?
1885HenryFord
Itwasinventedin1885.
ItwasinventedbyHenryFord
car
Whenwastheairplaneinvented?
Whowastheairplaneinventedby?
1907Wright
Itwasinventedin1907.
ItwasinventedbyWright
airplane
WhenwastheTVinvented?
WhowastheTVinventedby?
Itwasinventedin1927.
ItwasinventedbyBaird.
Baird
1927
television
WhenwastheTVinvented?
Whowasthetelephoneinventedby?
Itwasinventedin1876.
ItwasinventedbyBell.
Bell
1876
telephone
WhenwastheTVinvented?
Itwasinventedin1876.
Whowasthetelephoneinventedby?
ItwasinventedbyBell.
Findtheruler
结构:be+V-.
am/are/is+动词的过去分词
was/were+动词的过去分词
一般现在时的被动语态:
一般过去时的被动语态:
被动语态(PassiveVoice)
一、英语的谓语动词有两种语态:
WespeakEnglish.
主语
谓语
宾语
Englishisspokenbyus.
主语
谓语
宾语
宾变主,主变宾,前加by;
动变被,看清be,结构分别be+pp
主动语态
被动语态
主变被解题步骤:
——即动作的承受者。
Theymakeshoesinthatfactory.
Shoes
——即be动词的单复数。
are
were
——即be动词的时态。
——即原句动词改为过去分词。
made
——即by+主语/宾语。
bythem.
Tombrokethewindow.

ThewindowwasbrokenbyTom.
Tombrokethewindows.

ThewindowswerebrokenbyTom.
Hebrokethewindows.

Thewindowsw

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