Learn Hardcore Russian: Иногда моё состояние утром тяжёлое, но к вечеру мне достаточно короткой прогулки, и я снова счастлив. - Sometimes my state in the morning is heavy, but by evening a short walk is enough for me, and I am happy again.

English: My condition is heavy in the morning.
Russian: Моё состояние утром тяжёлое. (literally “My condition in the morning heavy.”)
English: I am happy again.
Russian: Я снова счастлив. (literally “I again happy.”)

The verb есть (“is/are”) exists, but in the present tense it sounds either emphatic or bookish here.
You would only insert it for emphasis, special contrast, or in some set phrases, not in this neutral sentence.

Why is it к вечеру and not just вечером or до вечера?

All three exist, but they mean different things:

к вечеру – by evening, towards evening, closer to that time.
- Focus: the process of moving toward the evening.
вечером – in the evening, during the evening.
- Focus: the period of time itself.
до вечера – until evening, up to that point, no later.
- Focus: an end limit.

In the sentence, к вечеру мне достаточно короткой прогулки means that by the time evening comes, a short walk is enough. So к вечеру (preposition к + dative вечеру) is the natural choice here.

What exactly is going on grammatically in мне достаточно короткой прогулки?

This is a very common impersonal construction:

мне – dative, “to me / for me”
достаточно – “enough; sufficient”
чего? – genitive object after достаточно

Literal structure:
Мне достаточно короткой прогулки.
= “To me (for me) [there is] enough of a short walk.”

Natural English:
“A short walk is enough for me” / “I only need a short walk.”

Key points:

мне is in the dative: it marks the person for whom something is enough/necessary.
достаточно here behaves like a quantifier and governs genitive.
The “is” is omitted as usual in the present tense.

Why is it короткой прогулки (genitive) and not короткую прогулку (accusative)?

After достаточно (enough) used in this way, the noun usually goes in the genitive:

достаточно воды – enough water
достаточно времени – enough time
достаточно денег – enough money
достаточно короткой прогулки – a short walk is enough

So the pattern is:

достаточно + Genitive = “enough (of) X”

короткой – genitive singular feminine
прогулки – genitive singular feminine

You would use короткую прогулку (accusative) with verbs that directly take an object, e.g.:

Я люблю короткую прогулку. – I love a short walk.
Я делаю короткую прогулку. – I take a short walk.

Why is it я снова счастлив and not я снова счастливый?

Russian has short-form adjectives used mainly as predicates (to describe a temporary state or result):

счастлив – short form
счастливый – full form

Я снова счастлив:

Feels like “I’m happy again (now)”, a state or mood, often more temporary or situational.

Я снова счастливый:

Grammatically possible, but sounds less natural here; it can suggest more of a characteristic or style (“a happy person again”) rather than simply “I feel happy again.”

In modern Russian, for emotional states as predicates, short forms like счастлив, доволен, рад are extremely common and sound more idiomatic:

Я доволен. – I’m satisfied.
Мы рады. – We’re glad.
Она счастлива. – She’s happy.

So я снова счастлив is the natural choice.

Why is утром used without a preposition, instead of something like в утром?

With parts of the day, Russian often uses adverbial forms without a preposition:

утром – in the morning
днём – in the afternoon / during the day
вечером – in the evening
ночью – at night

You do not say в утром; that’s incorrect.

So:

Моё состояние утром тяжёлое. – My condition is bad in the morning.
Вечером мне лучше. – In the evening I feel better.

These words are historically instrumental, but they function like adverbs of time.

Can I change the word order to Утром моё состояние тяжёлое? Does it change the meaning?

Yes, you can say:

Иногда утром моё состояние тяжёлое.
Иногда моё состояние утром тяжёлое.
Иногда утром тяжёлое моё состояние. (more stylized)

The basic meaning is the same: Sometimes my condition is bad in the morning.

Word order in Russian is flexible and is often used to:

highlight what’s new or important, or
set the rhythm of the sentence.

Differences are subtle:

Утром моё состояние тяжёлое. – starts by emphasizing the time (“In the morning, my condition is bad…”).
Моё состояние утром тяжёлое. – starts by emphasizing my condition.

All are grammatically correct; the given order is simply a natural, neutral option.

Why is иногда placed at the very beginning? Could it go somewhere else?

Yes, иногда is mobile:

Иногда моё состояние утром тяжёлое.
Моё состояние иногда утром тяжёлое.
Моё состояние утром иногда тяжёлое.

All are possible, but the most common and neutral is to put иногда near the start, applying to the whole statement:

Иногда моё состояние утром тяжёлое. – Sometimes, my condition is bad in the morning.

If you move it later, it can sound a bit more marked or stylistic. The main rule: place it close to the word or idea you want it to modify, but the sentence here is simple enough that it always reads as “sometimes” modifying the whole situation.

Why is there a comma before и я снова счастлив in Russian?

Russian comma rules are stricter than English.
Here we have three clauses:

Иногда моё состояние утром тяжёлое,
но к вечеру мне достаточно короткой прогулки,
и я снова счастлив.

Each clause has its own subject and (explicit or implied) predicate, so they are independent clauses joined by но and и.

Russian normally puts a comma before coordinating conjunctions (и, но, а, однако etc.) when they join independent clauses. So:

..., но ... – comma required
..., и ... – comma required (here, because it joins whole clauses, not just words in a list)

In English you might or might not put a comma before “and,” but in Russian in this structure the commas are obligatory.