Tā wánzhe wánzhe, jiù bù juéde wúliáo le.

The structure V 着 V 着，就 … (here: 玩着玩着，就…) is a very common pattern in Mandarin.

• 玩着玩着 literally: “playing-playing (with 着)”
• Function: “as (she) kept playing / while (she) was playing for a while, then…”

It describes:

1. An action that continues for some time (玩着玩着), and
2. A new situation or result that appears, often somewhat unexpectedly (就不觉得无聊了).

So 她玩着玩着，就不觉得无聊了 ≈ “As she kept playing, she (then) no longer felt bored.”

You can say 她玩着，就不觉得无聊了, and it’s grammatically fine:

• 她玩着，就不觉得无聊了。
  “While she was playing, she didn’t feel bored.”

However, the V 着 V 着 reduplication:

• Sounds more natural and vivid in this “process → change” structure.
• Emphasizes a gradual, ongoing action leading into a new state.

玩着，就… = more neutral “while playing, …”
玩着玩着，就… = stronger sense of “as she continued playing, (then unexpectedly) …”

In 玩着玩着, 着 is the aspect particle zhe (neutral tone), not the verb zháo.

Its main role:

• Marks a continuous / ongoing action or state.
• Similar to “-ing” in English, but not exactly the same.

So:

• 玩着 ≈ “be playing / in the middle of playing”
• 玩着玩着 highlights that she is in the process of playing over some stretch of time, not just starting or finishing.

They are doing different jobs and can coexist:

• 着 (in 玩着) marks an ongoing process:
  → “(She) is in the middle of playing.”

• 了 (in 无聊了) marks a change of state:
  → “(She) is now no longer bored (different from before).”

So the logic is:

• While she was continuously playing (玩着玩着),
• A new situation appeared: she no longer felt bored (不觉得无聊了).

No contradiction: one describes the ongoing action; the other describes the new resulting state.

不 and 没 both negate verbs, but they have different typical uses:

• 不: habitual, general, or present/future state; also commonly used with mental verbs (think, feel) for “not” / “no longer”.
• 没: past events, completed actions, or “didn’t happen / hasn’t happened”.

In 不觉得无聊了:

• 觉得 is a mental/state verb: “to feel, to think”.
• We are talking about her current state after a change:
  “(Now) she doesn’t feel bored anymore.”

So 不觉得无聊了 naturally means:

• “She no longer feels bored now.”
• “She doesn’t feel bored (anymore).”

没觉得无聊 would sound more like:

• “She didn’t feel bored (at that time / didn’t have the feeling of boredom).”

With 了 marking change, 不 fits better to express: she has stopped feeling bored.

就 is an adverb that often marks:

• Result, consequence, or natural outcome:
  • “then”, “as a result”, “so”, “right then”

In 玩着玩着，就不觉得无聊了:

• 就 links the process (玩着玩着) with the result (不觉得无聊了).
• It suggests: as a natural consequence of playing for a while, she then stopped feeling bored.

If you omit it:

• 她玩着玩着，不觉得无聊了。

This is still understandable, but:

• The connection between “playing” and “not bored anymore” feels less explicit.
• With 就, the sentence flows more naturally and sounds more idiomatic.

• 无聊 by itself = “bored” (state), with no clear beginning or change.
• 无聊了 = “has become bored” / “(is) now bored” or “is not bored anymore” when negated.

In this sentence we have 不觉得无聊了:

• The 了 is a sentence-final change-of-state marker.
• Together with 不, it means: “She is no longer in the state of boredom; that state has changed.”

So:

• 她不觉得无聊。
  “She doesn’t feel bored.” (just a neutral statement)

• 她不觉得无聊了。
  “She doesn’t feel bored anymore (now).”
  “She’s not bored anymore.”

On its own, 她玩着玩着 is understood but feels incomplete in normal speech/writing:

• It sets up a background situation: “As she kept playing…”
• We expect a result or main event to follow.

That is exactly what happens:

• 她玩着玩着，就不觉得无聊了。
  “As she kept playing, she then no longer felt bored.”

So:

• Grammatically, 她玩着玩着 is the adverbial / background part.
• The full clause needs the following 就不觉得无聊了 to feel complete.

You can use this pattern with many verbs, especially actions that can continue over time. Some common examples:

• 走着走着，就迷路了。
  “As (we) kept walking, (we) ended up getting lost.”

• 聊着聊着，就天黑了。
  “As (we) kept chatting, it became dark.”

• 看着看着，就睡着了。
  “As (he) kept watching, he fell asleep.”

General pattern:

Subject + V 着 V 着，就 + New situation / result + 了

Meaning: “As [subject] kept V-ing, then [new result] occurred.”

Both involve repetition, but they have different functions:

1. 玩着玩着 (V 着 V 着):

   • Emphasizes a continuous action over some time.
   • Often leads into an unexpected or new result.
   • Pattern: V 着 V 着，就…

2. 玩玩 (V V, without 着):

   • A verb reduplication for a brief or light action:
     • “play a bit / play for fun / give it a try”
   • Example:
     你去玩玩吧。 – “Go play a bit.”

So:

• 她玩着玩着，就不觉得无聊了。
  “As she kept playing, she stopped feeling bored.”

• 她玩玩，就不觉得无聊了。
  Would sound more like: “She just played a bit and then didn’t feel bored.”
  → Less about a long, continuous process and more about a short try.

Some natural English renderings that keep the nuance of 玩着玩着，就… + 了:

• “As she kept playing, she stopped feeling bored.”
• “After she played for a while, she didn’t feel bored anymore.”
• “While she was playing, she gradually stopped feeling bored.”

All of these reflect:

• Ongoing action (玩着玩着)
  → leading to
• A changed state (不觉得无聊了: “no longer bored”).