Если дома нет кофеварки, я пью растворимый кофе.

Если means if. In this sentence, it introduces a condition:

• Если дома нет кофеварки... = If there is no coffee maker at home...

Because the main verb is also in the present tense (я пью), the whole sentence sounds like a general/habitual statement:

• Whenever there’s no coffee maker at home, I drink instant coffee.

So this is not necessarily about one specific occasion. It can describe a routine or usual behavior.

Here дома means at home. It is a very common adverb-like word in Russian.

• Я дома = I’m at home
• Дома нет кофеварки = There is no coffee maker at home

This is different from в доме, which more literally means in the house/building.

So:

• дома = at home
• в доме = in the house / inside the building

A learner might also notice that дома can look like the plural of дом, but here it is not a plural noun. It is the fixed expression meaning at home.

Нет is the normal Russian word used to express absence or nonexistence:

• Дома нет кофеварки = There is no coffee maker at home

Russian often uses есть / нет for there is / there isn’t type sentences.

Compare:

• Дома есть кофеварка = There is a coffee maker at home
• Дома нет кофеварки = There is no coffee maker at home

So нет is not just a simple not; it specifically means there is not / there isn’t.

Because нет requires the genitive case.

The dictionary form is:

• кофеварка = coffee maker

But after нет, it changes to genitive singular:

• нет кофеварки

This is a very important pattern in Russian:

• есть книга = there is a book
• нет книги = there is no book

So in your sentence:

• дома нет кофеварки

the word кофеварки is in the genitive because нет governs the genitive.

In the present tense, Russian usually does not use a verb equivalent to English is/am/are in ordinary sentences.

So English:

• There is no coffee maker at home

becomes Russian:

• Дома нет кофеварки

There is no separate present-tense word for is here.

This is normal in Russian. The idea of there is / there isn’t is often expressed with есть or нет, without any extra present-tense form of to be.

Because Если дома нет кофеварки is a subordinate clause introduced by если.

Russian normally separates this kind of clause with a comma:

• Если дома нет кофеварки, я пью растворимый кофе.

This is similar to English punctuation in sentences like:

• If there’s no coffee maker at home, I drink instant coffee.

So the comma is standard and expected.

Пью is the 1st person singular present tense of пить (to drink).

Conjugation:

• я пью = I drink
• ты пьёшь = you drink
• он/она пьёт = he/she drinks

This verb is a bit irregular, so the form may not look obvious at first.

In the sentence:

• я пью растворимый кофе

it means I drink instant coffee.

Because the sentence describes a usual reaction to a situation, the present tense is natural.

Russian often uses the present tense for habitual or general situations.

So:

• Если дома нет кофеварки, я пью растворимый кофе

means something like:

• If there’s no coffee maker at home, I drink instant coffee
• Whenever there’s no coffee maker at home, I drink instant coffee

It describes what the speaker normally does, not necessarily what they are doing right now.

Because растворимый кофе is the direct object of пью.

• растворимый = instant / soluble
• кофе = coffee

With пить, the direct object usually goes in the accusative case. But here there is an important detail:

• кофе is an inanimate masculine noun
• for many inanimate nouns, the accusative looks the same as the nominative

So:

• я пью кофе = I drink coffee

The adjective растворимый also matches кофе in the correct form, and here it looks the same as the nominative too.

In Russian, adjectives usually come before the noun, just as in English:

• растворимый кофе = instant coffee
• горячий чай = hot tea
• чёрный хлеб = black bread

So this word order is the normal one.

Yes, very often it can.

Russian verbs already show the person, so:

• Я пью растворимый кофе
• Пью растворимый кофе

can both mean I drink instant coffee.

Including я can add:

• emphasis
• contrast
• clarity

In this sentence, я is perfectly natural, but omitting it would also be possible:

• Если дома нет кофеварки, пью растворимый кофе.

That version sounds a little more conversational.

Yes. Russian word order is flexible.

The original sentence is neutral and natural:

• Если дома нет кофеварки, я пью растворимый кофе.

But you could also say:

• Я пью растворимый кофе, если дома нет кофеварки.

Both are correct. The difference is mostly about emphasis and flow:

• starting with Если... highlights the condition first
• starting with Я пью... highlights the action first

Russian uses word order more flexibly than English, but not every order sounds equally natural in every context.

It can often imply either one, depending on context.

Literally, it is closer to:

• There is no coffee maker at home

But in real usage, that may also suggest:

• I don’t have a coffee maker at home

Russian often expresses possession through existence/location:

• У меня есть кофеварка = I have a coffee maker
• У меня нет кофеварки = I don’t have a coffee maker

So дома нет кофеварки focuses on the situation at home, not directly on ownership, but the practical meaning may overlap.

Yes, these are useful:

• е́сли
• дóма
• нет
• кофева́рки
• пью
• раствори́мый
• ко́фе

A rough pronunciation guide:

• Если дома нет кофеварки, я пью растворимый кофе.
• YES-li DO-ma nyet ka-fe-VAR-kee, ya pyu ras-tva-REE-my ko-fe

The form пью can be tricky because of the consonant cluster and the ью sound. It is pronounced as one syllable.