wǒ xiànzài yìdiǎnr yě bú è, yǐjīng hěn bǎo le.

This is a common emphatic pattern:

一点儿也不 + adjective/verb

It means not ... at all or not even a little bit ....

So:

• 一点儿 = a little bit
• 也 = even / also, but in this negative pattern it helps create emphasis
• 不饿 = not hungry

Together, 一点儿也不饿 means not hungry at all.

Compare:

• 我现在不饿。 = I’m not hungry now.
• 我现在一点儿也不饿。 = I’m not hungry at all now.

The version with 一点儿也不 is stronger.

This is because of the tone-change rule for 一.

Normally, 一 is first tone: yī.
But its tone changes depending on the next syllable:

• before a 4th tone, 一 becomes 2nd tone: yí
• before a 1st, 2nd, or 3rd tone, 一 becomes 4th tone: yì

In 一点儿, the next syllable is 点 diǎn, which is 3rd tone, so 一 becomes yì.

So:

• 一 + 点 (3rd tone) → yìdiǎn

This is another tone-change rule.

Normally, 不 is 4th tone: bù.
But when it comes before another 4th-tone syllable, it changes to 2nd tone: bú.

Since 饿 è is 4th tone:

• 不饿 is pronounced bú è

This change is only in pronunciation. The character is still written 不.

The 儿 here is part of erhua, a pronunciation feature common in many northern and standard Mainland Mandarin forms.

So:

• 一点 and 一点儿 both mean a little / a bit
• 一点儿 sounds more natural in many Mainland speech contexts

In this sentence, 一点儿也不... is a very common spoken pattern.

In Taiwan, learners may hear 一点也不... more often, without the 儿 sound.

Because 饿 and 饱 are stative words in Mandarin. They describe a state directly, so they can act as the predicate without 是.

So Mandarin says:

• 我饿。 = I’m hungry.
• 我很饱。 = I’m full.

Not:

• 我是饿
• 我是饱

In English, we need to be, but Mandarin often does not when using adjectives or stative verbs like 饿, 累, 忙, 高兴, 饱.

很 can mean very, but in many adjective predicates it is also used to make the sentence sound natural.

With 饱, the meaning can be somewhere between:

• full
• quite full
• very full

In this sentence, because of 已经 and 了, 已经很饱了 strongly suggests:

• already quite full
• already very full

So here 很 is not completely empty in meaning; it adds some degree.

Possible comparisons:

• 我饱了。 = I’m full.
• 我很饱。 = I’m quite/full or very full, depending on context.
• 我已经很饱了。 = I’m already pretty/full enough now.

The final 了 does not simply mark past tense.
Here it marks a new situation or change of state.

So 很饱了 means something like:

• now I’m full
• I’ve become full
• I’m full now

It tells the listener that the speaker’s current state has changed or is now relevant.

That is why:

• 我已经很饱了 feels natural for I’m already full now
• it is not just about the past; it is about the present result

They work together, but they are not the same thing.

• 已经 = already
• 了 = change of state / new situation / completed development

So:

• 已经 tells you the action or state has happened earlier than expected
• 了 shows that this is now the current situation

In 已经很饱了, the meaning is roughly:

• I’m already full now
• I’ve already reached the state of being full

Using both is very common and natural.

Yes, both are possible.

In Mandarin, time words often appear before the main predicate, and both of these are natural:

• 我现在一点儿也不饿。
• 现在我一点儿也不饿。

The difference is mainly emphasis:

• 我现在... sounds neutral and very common
• 现在我... puts more focus on now

So 现在我... can feel like as for now or right now.

They are very close in meaning. Both mean not at all.

Compare:

• 我一点儿也不饿。
• 我一点儿都不饿。

Both are natural. In modern spoken Mandarin, many speakers use 都 very often in this pattern, but 也 is also correct and common.

So for learners, it is helpful to recognize both as standard emphatic negatives.

Yes. They describe opposite physical states:

• 饿 = hungry
• 饱 = full

Putting them together in one sentence is very natural, because the second clause explains the first:

• 一点儿也不饿 = not hungry at all
• 已经很饱了 = already quite/full enough

So the logic is:

I’m not hungry at all now, because I’m already full.

This kind of two-part explanation is very common in Chinese.