“All that year the animals worked like slaves. But they were happy in their work”
Technique: Simile set against an ironic contrast
The first sentence compares the animals to slaves, the very condition the Rebellion was meant to end, and the next answers it with happiness. The conjunction “But” places the two side by side without comment: the narrator reports the animals' contentment in their own terms, while the simile tells the reader what it is worth. Orwell lets the reader see what the animals cannot, that the Rebellion has changed who commands their labour rather than the labour itself.
“This work was strictly voluntary, but any animal who absented himself from it would have his rations reduced by half.”
Technique: Self-contradiction in official language
The adverb “strictly” insists on a freedom that the clause after “but” takes away. An order backed by hunger is not voluntary, yet the regime keeps the word because it sounds like a choice. The flat reporting voice presents the contradiction as ordinary policy, and that is the point: official language here does not deny the facts, it describes them in words that mean their opposite, so the pigs can compel labour while still speaking of free choice.
“His two slogans … seemed to him a sufficient answer to all problems.”
Technique: Deadpan irony through Boxer's point of view
The two slogans are “I will work harder” and “Napoleon is always right”. The words “seemed to him” mark the judgement as Boxer's, and the narrator reports it without comment, which lets the reader hear how little two slogans can answer. The first makes Boxer the farm's greatest asset; the second hands every judgement to Napoleon. Together they explain why the pigs can take so much from him: his goodness and his obedience have become the same quality. The chapter shows him hauling stone alone, admirable and tragically easy to use.
“Are you certain that this is not something that you have dreamed, comrades? … Is it written down anywhere?”
Technique: Rhetorical questions
Squealer answers a doubt with questions, and each one moves the burden of proof onto the animals. The first calls their shared memory a dream; the last makes a written record the only test of truth, on a farm where most animals cannot read and the pigs did the writing. Because nothing was written, the animals decide they were mistaken. Orwell shows a past being abolished for want of a document, and a people taught to distrust their own minds.
“the sight of Napoleon, on all fours, delivering orders to Whymper, who stood on two legs, roused their pride”
Technique: Visual contrast and dramatic irony
The picture flatters the animals: a pig giving orders to a man turns the old order upside down, and they take comfort from it. But four legs set against two recalls the slogan the sheep bleat, and the reader remembers that Old Major, in Chapter 1, forbade trade altogether. The animals' pride hides the real change, which is that Napoleon now needs Whymper. In Chapter 10 the image is reversed, when Napoleon himself walks upright.
“Clover had not remembered that the Fourth Commandment mentioned sheets; but as it was there on the wall, it must have done so.”
Technique: Free indirect style and the naive narrator
The sentence follows Clover's own reasoning, so it sounds sensible, and that is the irony. She trusts the painted wall over her memory, although the reader, who saw this Commandment painted in Chapter 2, knows it has changed; Chapter 8, with Squealer, a ladder and a pot of white paint, all but shows who changes the Commandments. The words that open the full sentence, “Curiously enough”, are the narrator's dry hint, but the conclusion is left to the reader. Rewritten history works best when its victims supply the logic themselves.
“A bed merely means a place to sleep in. A pile of straw in a stall is a bed, properly regarded.”
Technique: Redefinition and minimising language
Squealer does not deny that the pigs sleep in beds; he changes what the word means. The adverb “merely” and the phrase “properly regarded” make the new definition sound modest and learned, and stretching the word to cover straw implies every animal has always slept in a bed, so the rule can only ever have meant sheets. He speaks with dogs at his side and finishes with the threat of Jones. Whoever controls the words can break the rules without appearing to.
“Do you know the enemy who has come in the night and overthrown our windmill? SNOWBALL!”
Technique: Rhetorical question, capitals and scapegoating
Napoleon begins quietly and builds to a name printed in capitals, roared out. The question pretends to invite thought, but only one answer is allowed, and the evidence comes afterwards, when he sniffs a few yards of footprints and pronounces them Snowball's. The narrator has just described a violent gale, so the reader holds an explanation that Napoleon never mentions, though the animals lived through the same storm. An absent enemy cannot answer back, and from now on Snowball can be blamed for any failure the regime would otherwise have to own.