péngyou dài le xiǎochī hé yǐnliào.

The sentence follows the standard Mandarin pattern:

Subject + Verb + Object

• 朋友 = subject
• 带了 = verb + aspect marker
• 小吃和饮料 = object

So the structure is very straightforward. Mandarin often uses this same basic order as English, even though other details work differently.

Mandarin does not use articles like English does. That means nouns can appear by themselves without a word for a or the.

So:

• 朋友 can mean a friend, the friend, or friends
• 小吃 can mean snacks or some snacks
• 饮料 can mean drinks, a drink, or some beverages

The exact meaning depends on context. If you want to be more specific, Mandarin uses other words, such as:

• 一个朋友 = one/a friend
• 这个朋友 = this friend
• 一些小吃 = some snacks

By itself, 朋友 can be either singular or plural. Mandarin nouns usually do not change form for number.

So this sentence could mean:

• A friend brought snacks and drinks
• Friends brought snacks and drinks

Context tells you which one is meant.

If the speaker wants to make plurality clearer, they might say:

• 朋友们 = friends
• 几个朋友 = several friends

But in normal Mandarin, leaving it as 朋友 is very common.

Mandarin often leaves out information that is understood from context. If everyone already knows which friend is being talked about, just saying 朋友 is enough.

For example, in a conversation about a party, 朋友带了小吃和饮料 could naturally mean something like A friend brought snacks and drinks or The friend brought snacks and drinks without needing extra words.

If you do want to specify, you can say:

• 我的朋友 = my friend
• 他朋友 or 他的朋友 = his friend

In this sentence, 带 means bring, bring along, or carry with you.

It often has the idea of taking something along when you come somewhere. So 带了小吃和饮料 means the friend brought snacks and drinks with them.

Depending on context, 带 can also mean things like:

• carry
• take along
• lead
• wear in some expressions

But here, bring along is the natural meaning.

Here 了 marks the action as completed. This is often called the perfective 了.

So 带了 means that the action of bringing happened and is viewed as finished.

A very important point: 了 does not simply mean past tense. It marks completion, not just past time. In many cases, English translates it with the past tense, but the grammar is not exactly the same.

Compare:

• 朋友带小吃和饮料。 = a general statement, habit, or context-dependent action
• 朋友带了小吃和饮料。 = the bringing was completed

Sometimes yes, but it would change the nuance.

• 朋友带了小吃和饮料。
  This focuses on the completed action of bringing.

• 朋友带小吃和饮料了。
  This often sounds more like a new situation or a change of state, depending on context.

Sentence-final 了 and verb-attached 了 are related, but they are not always interchangeable. For a learner, the version in your sentence is the clearest and most direct way to say that the friend brought snacks and drinks.

Because no number or demonstrative is being used. In Mandarin, classifiers are usually needed when a noun comes after words like:

• 一 = one
• 这 = this
• 那 = that
• 几 = several

But when a noun is used in a general way as an object, no classifier is necessary.

So:

• 带了小吃和饮料 = brought snacks and drinks

If you wanted to be more specific, you could say things like:

• 带了一些小吃和饮料 = brought some snacks and drinks
• 带了几瓶饮料 = brought a few bottles of drinks
• 带了几样小吃 = brought several kinds of snacks

和 means and here. It links two nouns:

• 小吃
• 饮料

So 小吃和饮料 means snacks and drinks.

In this sentence, 和 is just joining two objects together. This is one of its most common uses.

They are neutral as written. Mandarin nouns often do not show singular/plural the way English nouns do.

• 小吃 can mean snack foods, snacks, or sometimes a snack item, depending on context.
• 饮料 can mean drinks, beverages, or sometimes a drink.

In this sentence, English will usually translate them in the plural: snacks and drinks.

朋友 is written péngyou.

Although dictionaries may show the second syllable as you without a tone mark in this word, that is because it is usually pronounced with a neutral tone in natural speech.

So it sounds like:

• péngyou, not a strong péngyǒu

This is very common in everyday Mandarin. The first syllable is stressed more clearly, and the second becomes lighter.

The other words are pronounced:

• 带 = dài
• 了 = usually neutral tone here, le
• 小吃 = xiǎochī
• 和 = hé
• 饮料 = yǐnliào

Sometimes, but the meaning changes slightly.

• 带 emphasizes bringing something along
• 拿 emphasizes holding, taking, or picking up

So:

• 朋友带了小吃和饮料 = the friend brought snacks and drinks along
• 朋友拿了小吃和饮料 = the friend took or picked up snacks and drinks

In many situations, 带 is the better choice if the idea is that someone came with those things.