Он ушёл посреди разговора.

Ушёл is the perfective past form of уйти. It shows a completed action: he left, and the departure is treated as a single finished event.

Шёл comes from идти and means was going / went on foot in an ongoing sense. It would not fit well here, because the sentence is about the moment he left the conversation, not the process of walking.

So:

• Он ушёл посреди разговора. = he left in the middle of the conversation.
• Он шёл... = he was walking / going...

Ушёл tells you three things:

1. Past tense
2. Masculine singular
3. Completed action

It agrees with он.

Related forms:

• он ушёл
• она ушла
• оно ушло
• они ушли

So if the subject changed, the verb form would change too.

The correct pronunciation is with ё: ушёл.

In many Russian texts, ё is written as е, so you may see ушел, but it is still pronounced ушёл. For learners, it is helpful to remember the ё, because it shows both the pronunciation and the stress.

So:

• written carefully: ушёл
• often written in ordinary text: ушел
• pronunciation: ush-YOL

Посреди means in the middle of.

It can be used literally:

• посреди комнаты = in the middle of the room

and figuratively:

• посреди разговора = in the middle of a conversation

It is a normal word, though in everyday speech people may also say:

• в середине разговора
• во время разговора (slightly different nuance)

Посреди often gives a strong sense of right in the middle of something.

Because посреди requires the genitive case.

The base form is:

• разговор = conversation

After посреди, it becomes:

• посреди разговора

So this is:

• разговор → nominative
• разговора → genitive singular

This is something you simply have to learn with the preposition: посреди + genitive.

Yes, in standard Russian, посреди is followed by the genitive.

Examples:

• посреди улицы = in the middle of the street
• посреди ночи = in the middle of the night
• посреди разговора = in the middle of the conversation

So if you learn посреди, learn it together with the pattern:

• посреди + genitive

They are similar, but not identical.

• посреди разговора = in the middle of the conversation
  • emphasizes that something happened partway through, interrupting it
• во время разговора = during the conversation
  • more neutral and broader

So in this sentence, посреди разговора suggests that he left right while the conversation was going on, almost with a sense of interruption.

Yes. В середине разговора is also correct and very natural.

Comparison:

• посреди разговора = a bit more vivid, often feels like right in the middle
• в середине разговора = also in the middle of the conversation, slightly more neutral

Both work here. A learner should understand both, but посреди is useful because it appears often in both literal and figurative contexts.

Yes, Russian can sometimes omit subject pronouns when the subject is clear from context.

So both are possible:

• Он ушёл посреди разговора.
• Ушёл посреди разговора.

Including он makes the subject explicit. It can help with clarity, contrast, or emphasis. In isolated example sentences, Russian often includes the pronoun for clarity, especially for learners.

No, Russian word order is fairly flexible.

The neutral order here is:

• Он ушёл посреди разговора.

But you could also say:

• Посреди разговора он ушёл.
• Он посреди разговора ушёл.

These all mean basically the same thing, but the focus shifts slightly:

• Он ушёл посреди разговора. = neutral statement
• Посреди разговора он ушёл. = emphasizes the timing
• Он посреди разговора ушёл. = can sound a bit more conversational or emphatic

This is a very common question.

• ушёл = went away / left
• вышел = went out / stepped out / exited

Ушёл focuses on leaving and being gone. Вышел focuses more on the movement out of a place.

So:

• Он ушёл посреди разговора. = he left in the middle of the conversation
• Он вышел из комнаты. = he went out of the room

Sometimes both can fit a situation, but they are not always interchangeable.

Historically it is connected with motion on foot, but in modern Russian уйти is often used more broadly for leave / go away, even when the exact method is not important.

In many everyday sentences, уйти simply means someone departed:

• Он ушёл домой.
• Она ушла с работы.

If you specifically want to say someone left by vehicle, Russian may use other verbs such as:

• уехал = left by transport
• улетел = flew away

But in a sentence like this one, ушёл is completely natural even if the emphasis is just that he left the conversation.

Yes. Он ушёл посреди разговора often suggests something a little abrupt, rude, or surprising, because leaving in the middle of a conversation breaks the normal flow.

The grammar itself does not force that interpretation, but the phrase naturally carries that implication in many contexts. So a listener may feel that his leaving was noticeable or inappropriate.