Даже если я устал после работы, я всё равно поливаю цветы и открываю окно.

It is a very common Russian pattern:

Даже если ... , всё равно ...

This means something like even if ..., still ... or even if ..., I still ....

• даже если introduces the concession or condition
• всё равно emphasizes that the result does not change

So the pair works together naturally:

• Даже если я устал, я всё равно поливаю цветы.

You can remove one part, but the sentence becomes a little less emphatic:

• Если я устал после работы, я всё равно поливаю цветы.
• Даже если я устал после работы, я поливаю цветы.

The full version is very idiomatic and clear.

Yes, устал is formally the masculine singular past form of устать, which means to get tired.

But in Russian, this form is very often used to describe a current state that resulted from something:

• Я устал = I’m tired / I got tired

So even though it looks like past tense, in real usage it often matches English present-state wording.

In this sentence, я устал после работы means that after work, the speaker is in a tired state.

If the speaker is female, it changes to:

• Даже если я устала после работы, я всё равно...

For I’m tired, Russian usually prefers я устал / я устала.

That is the most natural everyday way to describe your state.

Усталый is an adjective meaning tired, but it is used differently:

• усталый человек = a tired person
• у меня усталый вид = I look tired

You can sometimes hear forms with усталый, but for a simple statement about how you feel right now, я устал / устала is the normal choice.

Because the sentence describes a habitual or repeated action.

The speaker means something like: after work, even when tired, this is what I do anyway.

In Russian, the imperfective present is used for:

• repeated actions
• habits
• general routines
• ongoing processes

So:

• поливаю цветы = I water the flowers / I’m watering the flowers
• открываю окно = I open the window / I’m opening the window

Here the habitual meaning is the important one.

If you wanted a one-time future action, Russian would normally use perfective future forms:

• Даже если я устану после работы, я всё равно полью цветы и открою окно.

The main clause is clearly present habitual:

• я всё равно поливаю цветы и открываю окно

That means this is a routine or usual behavior.

The form устал does look past, but in this kind of expression it often describes the resulting state: I’m tired.

So the sentence mixes:

• a present habitual action in the main clause
• a state in the subordinate clause

The overall meaning is still general and present-time:

• whenever this situation happens, the speaker still does these things

Because после requires the genitive case.

So:

• работа = nominative
• после работы = genitive after после

This is something you mainly have to memorize: certain prepositions always govern certain cases.

Examples:

• после обеда = after lunch
• после фильма = after the movie
• после работы = after work

Also, Russian has no articles, so работы can mean work or the work/job, depending on context. In this sentence, it naturally means after work.

Yes. Both are direct objects, so they are in the accusative case.

• поливаю цветы
• открываю окно

But the forms happen to look familiar:

цветы

This is plural, inanimate.
For many inanimate plural nouns, the accusative looks the same as the nominative.

• nominative: цветы
• accusative: цветы

окно

This is singular, neuter, inanimate.
For inanimate neuter singular nouns, accusative is the same as nominative.

• nominative: окно
• accusative: окно

So yes, they are accusative, even though the form does not visibly change.

Yes, it could be omitted:

• Даже если я устал после работы, всё равно поливаю цветы и открываю окно.

That is grammatically fine, because Russian often drops pronouns when the subject is clear.

But repeating я is also very natural. It can make the sentence:

• clearer
• more balanced
• slightly more emphatic

So:

• ..., я всё равно поливаю...

sounds neat and explicit, especially in careful written language.

The comma separates the subordinate clause from the main clause.

The subordinate clause is:

• Даже если я устал после работы

The main clause is:

• я всё равно поливаю цветы и открываю окно

Russian normally uses a comma before or after clauses introduced by если, depending on word order.

There is no comma before и because и is simply joining two verbs with the same subject:

• поливаю
• открываю

So this is one clause with two coordinated actions, not two separate independent clauses.

Here всё равно means:

• still
• anyway
• all the same

It shows that the action in the main clause happens despite the situation in the first clause.

So:

• Даже если я устал, я всё равно поливаю цветы. = Even if I’m tired, I still water the flowers.

It is a fixed expression. You should not try to understand it word by word as everything equally in this sentence. As a unit, it means it makes no difference to the outcome.

Also, the standard spelling is всё with ё. In informal typing, Russians often write все равно, but learners should know it is pronounced as всё равно.

Yes, Russian word order is flexible, but the emphasis changes.

The given version is very natural:

• Даже если я устал после работы, я всё равно поливаю цветы и открываю окно.

You could also say:

• Даже если я устал после работы, всё равно я поливаю цветы и открываю окно.

This gives a bit more emphasis to всё равно.

Or:

• Цветы я всё равно поливаю и открываю окно.

This sounds more marked and puts focus on цветы.

So the original order is probably the best neutral version for a learner to copy.

Sometimes yes, but the nuance is different.

• даже если = even if
• хотя = although / even though

Даже если introduces something more like a concessive condition: even in that case, the result stays the same.

Хотя sounds more like stating a fact.

Compare:

• Даже если я устал после работы, я всё равно поливаю цветы.

  • Even if I’m tired after work, I still water the flowers.

• Хотя я устал после работы, я всё равно поливаю цветы.

  • Although I’m tired after work, I still water the flowers.

Both can work, but даже если fits the idea of even if that happens especially well.