Unit 9 When was it invented? Section A(辽宁省朝阳市凌源市)

课件14张PPT。将下列句子变成被动语态1.School allows students to choose their own clothes2.We use knives to cut.3.We speak Chinese4.School doesn’t allow students to smokeStudents are allowed to choose their own clothesKnives are used to cut.Chinese are spoken by us.Students aren’t allowed to smoke.Section A Unit 9 When was it invented ?a light bulbbe used for
light bulbscalculatorinventorinvent
inventionbe invented by
Telephone T Vcomputer car calculator1bListen and match the inventions
with the dates.abedc1876
1885
1927
1971
1976dabecExercises　１．小汽车是什么时候发明的？
When_____ the cars __________?２．刀是用来干什么的？
What ____the knife ____ _____?３．当冰被加热时，就会变成水。
When ice ___ _____ it___ _____ into water .
４．谁发明的电话？
Who ____ the telephone ______ ______?
were inventedisusedforisheatedischangedwasinvented byUnit 9 When was it invented?invent
inventor
invention
light bulb
calculator
be used for
be invented byWho were the light bulbs invented by ?
They were invented by Edison.
What are they used for ?
They’re used for seeing in the dark.
When was the calculator invented ?
It was invented in 1971.
HomeworkWrite your favorite inventions:
When were they invented?
Who were they invented by?
What were they used for ?
Goodbye!