Я работаю удалённо, в то время как друг работает здесь.

Because the verb changes depending on the subject.

• Я работаю = I work
• друг работает = a/my friend works

The verb работать means to work. In the present tense, its forms include:

• я работаю = I work
• ты работаешь = you work
• он/она работает = he/she works
• мы работаем = we work
• вы работаете = you work
• они работают = they work

So the sentence uses:

• работаю for я
• работает for друг

Удалённо means remotely or from a distance, especially in a work context.

So Я работаю удалённо means I work remotely.

It comes from the adjective удалённый, meaning remote or distant. In this sentence, удалённо is an adverb, so it describes how the person works.

Similar expressions you may also hear:

• работать удалённо = to work remotely
• работать дистанционно = to work remotely / at a distance
• работать из дома = to work from home

These are similar, but удалённо is a very common and natural choice.

В то время как means while, whereas, or at the same time that, depending on context.

In this sentence, it links two clauses and shows a contrast:

• Я работаю удалённо = I work remotely
• в то время как друг работает здесь = while/whereas a friend works here

So it can suggest both:

1. simultaneity — the two situations exist at the same time
2. contrast — the two situations are different

It is a bit more formal and explicit than just а.

Compare:

• Я работаю удалённо, а друг работает здесь.
  = I work remotely, and/but my friend works here.

• Я работаю удалённо, в то время как друг работает здесь.
  = I work remotely, while/whereas my friend works here.

The second one sounds a little more bookish or structured.

Because в то время как is a conjunction introducing a subordinate clause, and Russian normally separates such clauses with a comma.

So the sentence is divided into:

• Я работаю удалённо
• в то время как друг работает здесь

This is standard Russian punctuation.

You will often see commas before conjunctions like:

• что = that
• когда = when
• если = if
• потому что = because
• хотя = although
• в то время как = while/whereas

Russian often leaves out possessive words like мой when the meaning is obvious from context.

So друг работает здесь can mean:

• a friend works here
• my friend works here

Which one is meant depends on the situation and the translation you were given.

If the speaker wants to be especially clear or emphasize possession, they can say:

• мой друг работает здесь = my friend works here

But omitting мой is very common and natural.

Russian does not have articles like a, an, or the.

So друг can mean:

• a friend
• the friend
• my friend in some contexts

The exact meaning comes from context, word order, and the broader situation.

This is one of the biggest differences from English. Russian speakers do not need an article to make the sentence grammatical.

Друг is in the nominative case because it is the subject of the second clause.

In друг работает здесь:

• друг = the one doing the action
• работает = works
• здесь = here

Subjects are normally in the nominative case in Russian.

If друг had another role in the sentence, its form could change. For example:

• Я вижу друга. = I see a/my friend.
  Here друга is accusative.

But in your sentence, друг is the subject, so nominative друг is correct.

Yes. In many situations, тут and здесь both mean here.

So you could say:

• друг работает здесь
• друг работает тут

Both are natural.

The difference is mostly stylistic:

• здесь is a little more neutral
• тут can sound a little more conversational

In this sentence, здесь works very well.

Russian word order is flexible, but different orders can change emphasis.

The original sentence:

• Я работаю удалённо, в то время как друг работает здесь.

This is natural and neutral.

Possible variations:

• Удалённо я работаю, в то время как друг работает здесь.
  This emphasizes удалённо.

• Друг работает здесь, в то время как я работаю удалённо.
  This puts the friend’s situation first.

Russian allows this flexibility because verb endings and case forms help show who is doing what. But not every rearrangement sounds equally natural in every context. The original version is a good standard choice.

Yes, Russian can sometimes omit subject pronouns when the verb form already makes the subject clear.

So:

• Я работаю удалённо = I work remotely
• Работаю удалённо = I work remotely

Both are possible.

However, including я can make the contrast clearer, especially when another subject appears in the second clause:

• Я работаю удалённо, в то время как друг работает здесь.

Here, я helps set up a clear contrast between I and friend.

Not always. It depends on context.

Possible translations include:

• while
• whereas
• at the same time that

In some sentences, it mainly shows time:

• Я читал, в то время как она готовила.
  = I was reading while she was cooking.

In other sentences, it mainly shows contrast:

• Я работаю удалённо, в то время как друг работает здесь.
  = I work remotely, whereas my friend works here.

So while is often a good translation, but whereas may capture the contrast more clearly in some cases.

The standard spelling is удалённо, with ё, because it comes from удалённый.

In everyday Russian writing, especially informal text, people often replace ё with е, so you may also see:

• удаленно

But the pronunciation and meaning are the same. Learners should know that:

• удалённо = standard spelling
• удаленно = common simplified spelling in practice

This happens with many Russian words containing ё.