These particles single out an item to belittle, dismiss, or downplay it — 'things like ~', 'the likes of ~'. They can express humility, contempt, disbelief, or 'no way'. など is neutral-to-formal, なんか is casual, and なんて is casual and can also introduce surprise or link to a following comment.
[Noun] + など/なんか/なんて ; [Plain clause] + なんて
お酒なんか飲みたくない。
Osake nanka nomitakunai.
I don't want to drink anything like alcohol.
なんか belittles お酒, adding a dismissive 'stuff like alcohol' nuance.
私など、まだまだ勉強不足です。
Watashi nado, madamada benkyou busoku desu.
Someone like me still has a lot to learn.
など here lowers the speaker humbly — 'the likes of me'.
彼が嘘をつくなんて、信じられない。
Kare ga uso o tsuku nante, shinjirarenai.
I can't believe he would tell a lie!
なんて attaches to a whole clause to express shock/disbelief at the idea.
• Politeness/register: など (neutral, can be formal), なんか (casual speech), なんて (casual, adds emotion or precedes a comment). • Often pairs with negative or emotional predicates (〜たくない, 〜信じられない). • With oneself it becomes humble; with others or objects it becomes dismissive/contemptuous — tone decides. • なんて can also mean 'called/named' informally before nouns.
The JLPT rarely asks whether you recognise a pattern — it asks which of several similar patterns fits. These are the ones ~など/~なんか/~なんて is tested against.
くらい downplays by showing a minimal degree ('at least this much'); など/なんか/なんて downplay by expressing dismissal or contempt toward the item itself.
とか lists non-exhaustive examples neutrally; なんか/など add an evaluative, often belittling attitude rather than just 'examples such as'.
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