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.
The old picture of St. Clement’s Church in the room that Winston rents above Mr. Charrington’s shop is another representation of the lost past. Winston associates a song with the picture that ends with the words “Here comes the chopper to chop off your head!” (167) This is an important foreshadow, as it is the telescreen hidden behind the picture that ultimately leads the Thought Police to Winston, symbolizing the Party’s corrupt control of the past.
From the start, there is a foreshadowing of something unnatural or something wrong with the society depicted in the novel. "The clock struck thirteenth". In present-day, or in the past, the clock does not strike thirteen at one in the afternoon.