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