What are some examples of foreshadowing in 1984?

1984 by George Orwell is such an
extensive novel that to find examples of foreshadowing would have to depend on your
definition or your teacher's definition of foreshadowing. And, depending on what edition
you have, a great example of foreshadowing occurs around page 80, where Winston thinks
that

“[i]n the
end the Party would announce that two and two made five, and you would have to believe
it.”

Before the end of his
rehabilitation with O’Brien, Winston does accept this as truth. This is a great example
of foreshadowing. Another is around page 140 when the repeated entrances of the rats
foreshadow Winston’s trip into Room 101; Julia’s desire to clean behind the picture
foreshadows the telescreen’s surreptitious existence behind that picture. This is
another great example of foreshadowing.