Я вечно думаю, что успею всё сделать утром, и потом опять спешу.

Here вечно does not mean literally for eternity. In everyday Russian, it often means always, constantly, or all the time, usually with a slightly annoyed or self-critical tone.

So in this sentence, Я вечно думаю... means something like:

• I’m always thinking...
• I keep thinking...
• I forever think... (more literal, but less natural in English)

It suggests a repeated pattern that keeps happening.

Yes, Russian could say Вечно думаю... because the verb ending -ю already shows I.

Including Я makes the subject more explicit. It can sound a bit more personal, contrastive, or emotionally involved:

• Я вечно думаю... = I’m always thinking...
• Вечно думаю... = also natural, but a little less explicit

In this sentence, Я helps frame it as a personal habit or complaint.

Думаю is present tense, imperfective, because it describes a repeated habit or ongoing mental pattern:

• Я вечно думаю... = I’m always thinking... / I keep thinking...

The speaker is not talking about one single thought in the future. They are describing something they regularly do.

If you used a future form, it would change the meaning and sound like a specific future event rather than a recurring habit.

Что here means that and introduces a subordinate clause:

• Я думаю, что... = I think that...

So:

• Я вечно думаю, что успею всё сделать утром
  = I’m always thinking that I’ll manage to do everything in the morning

In English, that is often optional, but in Russian что is very commonly used in this structure.

Успею is the 1st person singular future of успеть, which means:

• to manage to do something in time
• to have enough time to do something

So что успею всё сделать утром does not just mean that I will do everything in the morning. It more specifically means:

• that I’ll manage to get everything done in the morning
• that I’ll have time to do everything in the morning

This idea of having enough time is built into успеть.

This is because успеть is a perfective verb.

In Russian, perfective verbs do not have a true present tense. Their present-looking forms actually refer to the future.

So:

• успею = I will manage
• not I manage in the present

This is very common with perfective verbs.

Сделать is the perfective infinitive, meaning to do / to complete.

After успеть, Russian often uses a verb that emphasizes completing the action:

• успею сделать = I’ll manage to do / get done
• успею делать would usually sound wrong here

The speaker means finishing everything, not just being in the process of doing it. That is why сделать fits better than делать.

Всё is the direct object of сделать, so it is in the accusative case.

However, for this word, the accusative looks the same as the nominative:

• всё = everything

So in:

• успею всё сделать

всё means everything and functions as what the speaker hopes to get done.

Утром is the instrumental case of утро.

In Russian, the instrumental is often used in time expressions like:

• утром = in the morning
• вечером = in the evening
• днём = during the day
• ночью = at night

So this is a very common adverbial time expression. You should think of утром as a set phrase meaning in the morning.

By itself, утром usually just means in the morning. The exact time reference depends on context.

In this sentence, it most naturally means the next morning / that morning period when I plan to do everything. But grammatically, it is not specifically marked as tomorrow morning.

If Russian wanted to be more explicit, it could say:

• завтра утром = tomorrow morning

Together, потом опять means something like:

• and then again
• and then once again
• and then I end up... again

It shows that this is a repeated cycle:

1. the speaker thinks they will have time in the morning,
2. and then the same thing happens again:
3. they end up rushing.

Опять adds the idea of repetition: again.

Спешу comes from спешить = to hurry / to rush.

It is imperfective present because it describes what repeatedly happens as the result of this pattern:

• и потом опять спешу = and then I’m rushing again

This is not about one completed act of rushing. It is about a recurring situation or habitual result. That is why the imperfective present works well here.

Yes, depending on context.

Спешить can mean:

• to hurry
• to be in a hurry
• to rush

Here потом опять спешу is probably best understood as:

• and then I end up rushing again
• and then I’m in a hurry again

English often uses be in a hurry or end up rushing to sound more natural.

There is a comma because что успею всё сделать утром is a subordinate clause introduced by что.

Russian punctuation requires a comma before a subordinate clause like this:

• Я думаю, что...

So:

• Я вечно думаю, что успею всё сделать утром...

is punctuated normally.

The comma before и separates two larger parts of the sentence:

1. Я вечно думаю, что успею всё сделать утром
2. и потом опять спешу

The first part is one full statement, and the second adds another action that follows from it. In Russian, when и joins clauses like this, a comma is often used.

So the punctuation helps show the structure:

• I always think [that I’ll manage to do everything in the morning], and then I end up rushing again.

The word order is natural and expressive.

• Я вечно думаю... puts focus early on the speaker and the repeated habit.
• что успею всё сделать утром presents the content of the thought.
• и потом опять спешу gives the consequence.

Russian word order is flexible, but this version sounds very normal. If you rearranged it, the emphasis might change. For example:

• Я думаю вечно... would sound less natural here.
• Опять потом спешу would also sound awkward compared with потом опять спешу.

So the sentence uses a standard, idiomatic order.

It sounds conversational and slightly self-critical or mildly frustrated.

Words like вечно and опять make it feel like the speaker is describing an annoying repeated habit:

• I always think I’ll get everything done in the morning, and then I end up rushing again.

So the tone is not neutral and factual; it carries the feeling of this keeps happening, and I know it’s a pattern.