It’s difficult to imagine it as an invention. Is it difficult to imagine it as an invention?
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Transcript of It’s difficult to imagine it as an invention. Is it difficult to imagine it as an invention?
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It’s difficult to imagine it as an
invention.
Is it difficult to imagine it as an
invention?
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Ballpoint pen
Car assembly line
To clone
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diesel
digital stereo system
dynamite
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electric cell
helicopter
improvement
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instant coffee
laser
manufacturer
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match to
patent
penicillin
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to perfect
photocopier
to pioneer
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satellite
Scotch tape
steam engine
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trainers
telescope
telegraph
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typewriter
tyre
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Past Simple Passive
was
were
V3 / Ved
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Past Perfect Passive
Past
1827
1835
had been + V3 / VedMatches had been invented before an
incandescence lamp.
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A … had been …by the time a … was (were) … .
invented, developed, introduced, created, designed
A camera had been created by the time a dishwasher was invented.
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?1903
1800
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?1888
1960
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?
1837
1608
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?1888
1860s
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?
1955
1980s
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?
1765
1892
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?1990 1975
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?1827
1867
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?1954
1937
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?19391928
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