На пикнике мы разделили ягоды поровну, а потом я понемногу начала читать роман.

In Russian, на is often used with events, activities, and some outdoor/social settings, including пикник.

So:

• на пикнике = at the picnic
• not usually в пикнике

This is similar to other expressions like:

• на концерте = at the concert
• на уроке = in class / at the lesson
• на встрече = at the meeting

So На пикнике is the normal way to say at the picnic.

Because the subject is мы = we.

Russian past tense agrees with the subject in gender and number:

• я разделил = I divided/shared out (masculine speaker)
• я разделила = I divided/shared out (feminine speaker)
• мы разделили = we divided/shared out

So разделили is simply the correct past-tense plural form for мы.

Here ягоды is accusative plural, because it is the direct object of разделили.

However, for inanimate nouns in Russian, the accusative plural is usually the same as the nominative plural. That is why the form looks unchanged.

For ягода:

• nominative singular: ягода
• nominative plural: ягоды
• accusative plural: ягоды

So in this sentence, ягоды means the berries as the thing being divided.

Поровну is an adverb, and it means:

• equally
• into equal shares
• so that everyone gets the same amount

In this sentence:

• разделили ягоды поровну = we divided the berries equally

It describes how the berries were divided.

A useful thing to remember is that Russian often uses adverbs where English might use a longer phrase.

Both а and и can connect parts of a sentence, but they are not exactly the same.

Here а потом suggests a new step or a shift:

• first, one thing happened
• and then / whereas then another thing happened

In this sentence:

• На пикнике мы разделили ягоды поровну, а потом...

The а helps mark a transition from the shared action we divided to the next part, where the subject becomes я.

So it feels a bit like:

• and then
• and after that
• while after that / as for what happened next

It is very natural here.

The first clause has the subject мы:

• мы разделили = we divided

The second clause has a different subject, я:

• я начала = I began

That is why the verb changes form.

начала is the past tense feminine singular form of начать. It tells us the speaker is female.

Compare:

• я начал читать = I began reading (male speaker)
• я начала читать = I began reading (female speaker)

So the sentence switches from we to I, and the verb changes accordingly.

After начать (to begin/start), Russian very often uses an imperfective infinitive to describe the action that was begun.

So:

• начала читать = began to read / started reading

The verb читать is imperfective, which fits the idea of an ongoing activity or process.

If you used прочитать, that would point more toward reading something through to the end. After начать, that is usually less natural unless you specifically want to stress beginning a completed-reading event.

So here начала читать роман is the normal and natural choice: I started reading the novel.

Понемногу means something like:

• little by little
• bit by bit
• a little at a time

In this sentence, it modifies the reading:

• я понемногу начала читать роман

This suggests that the speaker started reading the novel in small amounts, not all at once.

Depending on context, it can give a sense like:

• I started reading the novel little by little
• I began reading the novel a bit at a time

Yes, it is understandable and natural enough, but it has a specific nuance.

The idea is not just I started reading, but rather:

• I started reading it gradually
• I began reading it in small stretches

So понемногу adds the sense that the action happened in small portions.

A learner should notice that понемногу does not simply mean slowly. It means more like a little at a time.

Compare:

• медленно читать = to read slowly
• понемногу читать = to read bit by bit / in small amounts

Роман is the direct object of читать, so it is in the accusative singular.

But for a masculine inanimate noun, the accusative singular is the same as the nominative singular.

So:

• nominative: роман
• accusative: роман

That is why the form does not change.

Yes, Russian word order is flexible. This version is natural, but other orders are possible depending on emphasis.

The given order puts понемногу before начала читать, which highlights the manner of the action early:

• я понемногу начала читать роман

Possible alternatives include:

• а потом я начала понемногу читать роман
• а потом понемногу я начала читать роман

These are not all equally neutral, though. The original sounds smooth and normal.

In Russian, word order often reflects focus, rhythm, or what the speaker wants to highlight, not just grammar.

Разделили is perfective.

That matters because the sentence describes a completed action:

• we divided the berries equally

The action is presented as finished before the next event happens.

This fits well with the sequence:

1. мы разделили ягоды поровну
2. а потом я понемногу начала читать роман

So the perfective verb helps show that the first action was completed, and then the second action followed.

In this sentence, ягоды most naturally means the berries being talked about in that situation, even though there is no article in Russian.

Russian has no a/an/the, so whether a noun is definite or indefinite is understood from context.

Here, because of the picnic situation and the concrete action разделили ягоды поровну, it strongly sounds like specific berries that were present there.

So in English, the natural translation would usually be the berries, not just berries in a completely general sense.