Он предложил помощь взамен.

Предложил is the past tense, masculine singular form of the verb предложить (to offer, to propose).

A quick breakdown:

• предложить = infinitive
• предложил = he offered
• предложила = she offered
• предложило = it offered
• предложили = they offered

The -л is the standard marker used in Russian past-tense forms.

In this sentence, он is masculine, so the verb must be предложил.

Here помощь is the direct object of предложил, so it is in the accusative case.

The important thing is that for many inanimate nouns, the accusative singular looks the same as the nominative singular. That is what happens here:

• nominative: помощь = help
• accusative: помощь = help

So in Он предложил помощь, the word is accusative in function, even though it looks exactly like the dictionary form.

For comparison:

• без помощи = without help → genitive
• с помощью = with the help of → instrumental

Взамен means in return, in exchange, or instead depending on context.

In Он предложил помощь взамен, the idea is:

• He offered help in return
• He offered help in exchange

Very often, Russian leaves unsaid what exactly the help is being exchanged for if the context already makes it clear.

You can also see взамен with an expressed complement:

• взамен денег = in exchange for money
• взамен услуги = in return for a favor

So here the sentence is slightly compact: the thing he wanted or expected in return is not stated.

In this sentence, взамен works more like an adverbial word meaning in return.

But it can also function in a preposition-like way when followed by a noun in the genitive:

• взамен помощи = in exchange for help
• взамен старого = instead of the old one

So learners often meet it in two patterns:

1. standalone:
   Он предложил помощь взамен.
   = He offered help in return.

2. with a genitive noun:
   Он предложил помощь взамен денег.
   = He offered help in exchange for money.

Russian often omits possessive words like his, her, their, or even some when they are not necessary.

So Он предложил помощь naturally means:

• He offered help
• or sometimes He offered his help, depending on context

Russian usually adds a possessive only when it is important to stress ownership or contrast:

• Он предложил свою помощь. = He offered his help.

Adding свою makes it more explicit and often slightly more personal or emphatic.

This is a very common question because Russian aspect matters a lot.

• предложил = perfective
• предлагал = imperfective

Here предложил is used because the sentence describes a single completed act: he made the offer.

So:

• Он предложил помощь взамен.
  = He offered help in return.
  Focus: the offer happened as a complete event.

Compare:

• Он предлагал помощь.
  = He was offering help / He used to offer help / He offered help repeatedly

The imperfective предлагал would be used if you wanted to describe the process, repetition, or background situation rather than one completed offer.

No, Russian word order is flexible. The sentence as written is a neutral, natural order.

• Он предложил помощь взамен. = neutral
• Помощь он предложил взамен. = emphasizes help
• Взамен он предложил помощь. = emphasizes in return

Even though the word order can change, the cases and forms still show who did what.

That said, the original order sounds very normal in straightforward narration.

Взамен is perfectly normal Russian, but it can sound a little more bookish, written, or formal than some everyday alternatives.

Depending on context, Russians might also say things like:

• в ответ = in response
• в обмен = in exchange
• взамен этого = instead of that / in return for that

So взамен is absolutely correct and common, but it has a slightly more polished feel than very casual speech in some situations.

The stress is:

• он
• предложи́л
• по́мощь
• взаме́н

So the full sentence is pronounced roughly like:

• он предложи́л по́мощь взаме́н

Stress matters in Russian, so it is worth learning each word with its stress from the beginning.

Yes, depending on context, взамен can sometimes be understood as instead or in exchange.

But in a sentence like Он предложил помощь взамен, the most natural interpretation is usually:

• He offered help in return
• He offered help in exchange

If you want a very clear meaning of instead, Russian often uses other wording too, depending on the situation.

So the exact nuance of взамен comes from context:

• in return
• in exchange
• sometimes instead

Yes, absolutely.

• Он предложил помощь взамен. = He offered help in return.
• Он предложил свою помощь взамен. = He offered his help in return.

Adding свою makes the sentence more explicit and often more natural if you want to stress that it was his own help that he was offering.

Russian often leaves свою out when it is obvious, so both versions are correct.