zhège bāoxiāng quèshí hěn rènao.

Because 热闹 is an adjective, and in Mandarin adjectives can often act as the predicate directly.

So the pattern here is:

Subject + adverb + adjective

• 这个包厢 = this private room
• 确实 = indeed / really
• 很热闹 = lively

You usually do not say 这个包厢是很热闹 in normal Mandarin.
是 is more commonly used before nouns, pronouns, or for emphasis in special patterns.

Not always. In sentences like this, 很 often does not strongly mean very. It can simply make the adjective sound natural.

So:

• 这个包厢热闹 can sound a bit abrupt or contrastive in many contexts.
• 这个包厢很热闹 is the normal, natural way to say it.

In other words, 很 here is often closer to a grammatical smoothing word than a strongly emphatic very.

确实 means indeed, really, or truly. It adds a sense of confirmation.

It suggests something like:

• this is genuinely the case
• the speaker is affirming it based on experience or observation

So 这个包厢确实很热闹 sounds a bit stronger than just 这个包厢很热闹.

It can feel like:

• This private room really is lively
• This private room is indeed lively

Because 确实 and 很 do different jobs.

• 确实 modifies the whole statement: indeed / really
• 很 goes directly with the adjective 热闹

So the natural order is:

这个包厢 + 确实 + 很 + 热闹

You can think of it as:

This private room + indeed + quite/very + lively

很确实热闹 is not natural Mandarin.

包厢 usually means a private room or private compartment, especially in places like:

• restaurants
• KTVs
• teahouses
• theaters
• trains or other transport in some contexts

In modern everyday speech, many learners first meet 包厢 in the sense of a private dining room or KTV room.

So in this sentence, it most likely means a room separated from the main public area.

个 is the classifier in 这个.

Mandarin often uses this pattern:

这/那 + classifier + noun

So:

• 这 = this
• 个 = classifier
• 包厢 = private room

Together: 这个包厢 = this private room

Also, for 包厢, you may sometimes hear a more specific classifier like 间:

• 这间包厢

That can sound a bit more precise, while 个 is the very common general classifier in everyday speech.

In standard Mandarin, usually no. You normally need a classifier after 这 before a noun.

So you would say:

• 这个包厢
• 这间包厢

but not normally:

• 这包厢

Using a classifier is one of the basic patterns English speakers need to get used to in Chinese.

热闹 usually means lively, bustling, or full of activity. It is often positive or at least neutral-positive.

It is not exactly the same as noisy.

Compare:

• 热闹 = lively, animated, full of people or activity
• 吵 / 吵闹 = noisy, loud in an unpleasant or annoying way

So if a room is full of happy conversation, laughter, and energy, 热闹 fits well.
If the sound is irritating or chaotic, 吵 may be better.

It is commonly pronounced rènao.

That means:

• 热 = fourth tone
• 闹 = often pronounced in a light or neutral tone here

In many two-syllable words, the second syllable may be weakened in normal speech.
So even though 闹 by itself is fourth tone, in 热闹 the word is often said more like rènao.

This is very normal in spoken Mandarin.

Yes, often it can.

For example:

• 这个包厢真的很热闹
• 这个包厢确实很热闹

Both are natural, but the nuance is a little different:

• 真的 is more conversational and emotional
• 确实 sounds a bit more objective, confirming, or matter-of-fact

So 确实 can feel slightly more like indeed / certainly, while 真的 feels more like really.

You can do it like this:

Negative:

• 这个包厢不热闹。 = This private room is not lively.
• 这个包厢确实不太热闹。 = This private room really is not very lively.

Question:

• 这个包厢热闹吗？ = Is this private room lively?
• 这个包厢确实很热闹吗？ = Is this private room really lively?

This is a good way to see the basic structure more clearly:

• statement: 这个包厢确实很热闹。
• yes/no question: add 吗
• negative: use 不

A useful breakdown is:

这个包厢 / 确实 / 很 / 热闹。

• 这个包厢 = subject
• 确实 = adverb
• 很 = degree word
• 热闹 = adjective functioning as the predicate

So the overall pattern is:

Subject + adverb + degree word + adjective

This is a very common Mandarin sentence type, and learning it will help with many other sentences such as:

• 这个地方很漂亮。
• 他今天很忙。
• 这家店确实很好。