suǒyǒu péngyou dōu chī huǒguō.

所有 means all and directly modifies the noun 朋友.

• 所有朋友 = all friends
• 都 does not mean all by itself here; it helps show that the statement applies to the whole group.

A very common pattern in Mandarin is:

所有 / 每个 / 这些人 + 都 + verb phrase

So in this sentence:

所有朋友都吃火锅
= All the friends eat hotpot / All my friends eat hotpot (depending on context)

In short:

• 所有 marks the group as all
• 都 marks that the action applies to every member of that group

You will usually want 都 here.

In Mandarin, when the subject is something like all the friends, these people, or another plural/group expression, 都 is commonly used to show that the predicate applies to the entire set.

So:

• 所有朋友都吃火锅 = natural
• 所有朋友吃火锅 = possible in some contexts, but it sounds less complete or less natural to many speakers

For learners, a good rule is:

• If the subject means all, both, or a plural set being discussed together, 都 is very often needed.

Because 都 is an adverb, and adverbs in Mandarin usually go before the verb.

Basic order:

Subject + 都 + Verb + Object

So:

• 所有朋友 = subject
• 都 = adverb
• 吃 = verb
• 火锅 = object

That is why 都吃 is correct, not 吃都.

Both 所有朋友 and 所有的朋友 can appear, but 所有的朋友 is often the more fully explicit form.

• 所有的朋友都吃火锅 = very clear and natural
• 所有朋友都吃火锅 = shorter, more compact, also understandable

For many learners, it is safest to remember:

• 所有的 + noun is very common
• Omitting 的 can happen, especially in compact or less formal phrasing

So if you are unsure, 所有的朋友都吃火锅 is a very safe choice.

Mandarin nouns usually do not have to change form for plural the way English nouns do.

So 朋友 can mean:

• friend
• friends

The context tells you which one it is.

Here, 所有 already makes it plural, so 朋友 is enough.

Also, 们 is usually not used after a noun that already has a word like 所有 in front of it. So:

• 所有朋友 = good
• 所有的朋友 = good
• 所有朋友们 = usually unnatural

By itself, 所有朋友 does not specify whose friends they are. Mandarin often leaves that to context.

Depending on the situation, it could mean:

• all the friends
• all my friends
• all our friends
• all the relevant friends we are talking about

It usually does not mean all friends in the world unless the context somehow makes that clear.

If you want to be specific, you can say:

• 我所有的朋友都吃火锅 = All my friends eat hotpot
• 他们所有的朋友都吃火锅 = All their friends eat hotpot

Yes. 吃火锅 is the normal way to say eat hotpot or have hotpot.

In Chinese, 吃 is often used for meals, dishes, and eating occasions, even when the experience involves cooking at the table.

Examples:

• 吃饭 = eat / have a meal
• 吃早餐 = eat breakfast
• 吃火锅 = eat hotpot / have hotpot

So even though hotpot involves boiling ingredients in broth, Mandarin still normally says 吃火锅.

By itself, it usually sounds like a general statement or a context-dependent statement, not specifically right now.

So it can mean something like:

• All the friends eat hotpot
• All the friends like to eat hotpot
• All my friends are having hotpot only if context strongly supports that reading

If you want to make right now clearer, you can say:

• 所有朋友都在吃火锅 = All the friends are eating hotpot
• 所有朋友都去吃火锅了 = All the friends went to eat hotpot

Mandarin often relies on context unless a time word or aspect marker is added.

In meaning, yes, it is close. But grammatically, Mandarin is using the all + plural noun pattern here, not the every + singular noun pattern.

• 所有朋友都吃火锅 is structurally like all friends / all the friends
• A more every-type structure would use something like 每个

For example:

• 每个朋友都吃火锅 = Every friend eats hotpot

So the sentence with 所有 is closer to all friends than to every friend, even though the overall meaning can be similar.

No, those are not correct.

The normal structure is:

所有 + noun + 都 + verb + object

So:

• 所有朋友都吃火锅 = correct

But:

• 朋友所有都吃火锅 = incorrect
• 所有都朋友吃火锅 = incorrect

Think of 所有 as attached to the noun, and 都 as attached to the verb phrase.

It can refer to both, depending on context.

In 吃火锅, 火锅 often means the hotpot meal as a whole, not just one single dish in an abstract sense.

So 吃火锅 can suggest:

• eating hotpot as food
• going out for hotpot
• having a hotpot meal together

This is similar to how in English have pizza can mean both the food and the meal occasion.

A very useful pattern is:

所有（的）+ noun + 都 + verb phrase

Examples:

• 所有学生都来了 = All the students came
• 所有孩子都喜欢这个游戏 = All the children like this game
• 所有的朋友都吃火锅 = All the friends eat hotpot

If you remember that pattern, this sentence becomes much easier to understand and build on.