Моя жена говорит, что кофе из кофеварки вкуснее, чем растворимый.

Because жена is a feminine noun, so the possessive pronoun must also be feminine.

• мой = my, masculine
• моя = my, feminine
• моё = my, neuter
• мои = my, plural

So:

• мой брат = my brother
• моя жена = my wife

Here жена is nominative singular feminine, so моя is the correct form.

Yes, Russian word order is flexible, and Жена моя говорит is possible, but it sounds more marked or expressive.

The neutral, standard order here is:

• Моя жена говорит... = My wife says...

This simply introduces the subject in a normal way.

If you change the order, you usually change the emphasis:

• Моя жена говорит... = neutral
• Жена моя говорит... = more literary, emotional, or contrastive
• Говорит моя жена... = emphasizes the fact that it is your wife who says this

So the given order is just the most natural everyday version.

Говорит is:

• 3rd person singular
• present tense
• imperfective aspect
• from the verb говорить = to speak / to say

So:

• я говорю = I say / I am speaking
• ты говоришь = you say
• он/она говорит = he/she says

In this sentence, говорит means says.

Russian often uses говорить when reporting what someone says in general or as a repeated fact:

• Моя жена говорит, что... = My wife says that...

If you wanted a one-time completed act, you might use сказала instead:

• Моя жена сказала, что... = My wife said that...

Because что introduces a subordinate clause.

The structure is:

• Моя жена говорит = main clause
• что кофе из кофеварки вкуснее, чем растворимый = subordinate clause

Russian normally places a comma before что in this kind of sentence, just like English often uses that to introduce a clause:

• Она знает, что он дома.
• Я думаю, что это правильно.

So the comma is required here.

Here что means that.

So:

• Моя жена говорит, что... = My wife says that...

This is one of the most common uses of что in Russian.

Be careful: что can also mean what, depending on the sentence:

• Что это? = What is this?
• Я знаю, что это. = I know what it is.
• Я думаю, что это правда. = I think that it is true.

So in this sentence, it is the conjunction that, not the question word what.

Из means from / out of, and it requires the genitive case.

So:

• из кофеварки = from the coffee maker

The noun is:

• кофеварка = coffee maker

Its genitive singular form is:

• кофеварки

That is why you get:

• кофе из кофеварки = coffee from a coffee maker / coffee made in a coffee maker

This phrase describes the kind of coffee being discussed.

Because the sentence is talking about the coffee as something that comes from the machine, not the location where it is sitting.

• кофе из кофеварки = coffee from the coffee maker
• кофе в кофеварке = coffee in the coffee maker

In English, coffee from the coffee maker sounds more natural when comparing it with instant coffee. Russian does the same here.

So из кофеварки emphasizes the source or origin of the coffee.

Yes. Вкуснее is the comparative form of вкусный.

• вкусный = tasty
• вкуснее = tastier

So:

• кофе вкусный = the coffee is tasty
• кофе вкуснее = the coffee is tastier

Russian often forms comparatives with -ее / -ей:

• быстрый → быстрее = faster
• умный → умнее = smarter
• вкусный → вкуснее = tastier

So the sentence means that one type of coffee is tastier than another.

Russian can use both, but вкуснее is much more natural here.

There are two main ways to make a comparative:

1. Simple comparative:

   • вкуснее = tastier

2. Compound comparative:

   • более вкусный = more tasty / tastier

In everyday speech, the simple comparative is usually preferred when it exists naturally. So:

• кофе вкуснее sounds normal
• кофе более вкусный sounds more formal, heavier, or less idiomatic here

So вкуснее is the best choice.

Because чем introduces the comparison:

• вкуснее, чем растворимый = tastier than instant

In standard Russian spelling, a comma is normally used before чем in this kind of comparative construction.

So the structure is:

• X вкуснее, чем Y = X is tastier than Y

That is why the sentence has:

• вкуснее, чем растворимый

Here чем means than.

So:

• вкуснее, чем растворимый = tastier than instant

This is a very common pattern in Russian:

• лучше, чем... = better than...
• быстрее, чем... = faster than...
• интереснее, чем... = more interesting than...

So whenever you compare two things, чем is often the word you need.

Because Russian often leaves out a noun when it is obvious from context.

Earlier in the sentence, we already have кофе, so after that Russian can simply use the adjective alone:

• кофе из кофеварки вкуснее, чем растворимый
• literally: coffee from the coffee maker is tastier than instant

What is really meant is:

• ...чем растворимый кофе

But repeating кофе is unnecessary, because everyone already knows that the comparison is between two kinds of coffee.

This is very natural in Russian.

Yes, кофе is a special noun.

Traditionally, кофе is treated as masculine in standard Russian, even though it does not look like a typical masculine noun.

So you get:

• вкусный кофе
• горячий кофе
• растворимый кофе

That is why the adjective here is masculine singular:

• растворимый

In modern spoken Russian, some speakers may treat кофе as neuter, but masculine is still the standard form taught to learners and used in careful speech.

Yes, effectively it is.

Inside the clause after что, the structure is:

• кофе из кофеварки = subject/topic being talked about
• вкуснее = comparative predicate
• чем растворимый = comparison phrase

Russian often does not need a separate word for is in the present tense. So the full logical meaning is:

• кофе из кофеварки [есть] вкуснее, чем растворимый
• coffee from the coffee maker [is] tastier than instant coffee

The verb to be is simply omitted in the present tense, which is normal in Russian.

Because Russian usually leaves out the verb to be in the present tense.

In English you say:

• Coffee from the coffee maker is tastier.

In Russian, you normally just say:

• Кофе из кофеварки вкуснее.

This is one of the most important differences between English and Russian.

Compare:

• Он дома. = He is at home.
• Она врач. = She is a doctor.
• Кофе вкуснее. = The coffee is tastier.

So there is no missing word here; this is just how Russian works.

Yes, that is grammatically correct, but it means something slightly different.

• вкуснее = tastier, more delicious
• лучше = better

So:

• кофе из кофеварки вкуснее focuses specifically on taste
• кофе из кофеварки лучше is broader: better overall, maybe in quality, taste, experience, etc.

Since this sentence is specifically about flavor, вкуснее is more precise.