Mój laptop znowu się zawiesił, więc nie mogłem wysłać raportu.

Because laptop is a masculine singular noun in the nominative case, and mój has to agree with it.

Agreement here is:

• mój for masculine singular
• moja for feminine singular
• moje for neuter singular

So:

• mój laptop = my laptop
• moja mysz = my mouse
• moje okno = my window

Znowu means again.

It is very close in meaning to znów. In most situations, they are interchangeable:

• Mój laptop znowu się zawiesił.
• Mój laptop znów się zawiesił.

Both mean the same thing. Znowu can sound a little more conversational or slightly more emphatic in some contexts, but for a learner, treating them as near-equivalents is fine.

Here zawiesić się means to freeze, to hang, or to stop responding, especially for a computer, app, or device.

So:

• Laptop się zawiesił = The laptop froze.

This is a very common Polish way to talk about a computer malfunctioning.

Not really. In this sentence, się is part of the verb expression zawiesić się.

A useful contrast is:

• zawiesić = to suspend / hang something
• zawiesić się = to freeze / hang / get stuck

So:

• Zawiesiłem konto. = I suspended the account.
• Laptop się zawiesił. = The laptop froze.

Even though się originally has reflexive uses, in many verbs it is just part of the normal dictionary form, and you should learn the whole expression together.

Because Polish past tense agrees with the gender and number of the subject.

Here the subject is laptop, which is masculine singular, so the past form is zawiesił się.

Compare:

• laptop zawiesił się = masculine singular
• mysz zawiesiła się = feminine singular
• urządzenie zawiesiło się = neuter singular

Also, this is a perfective verb form, so it refers to one completed event: the laptop froze.

Więc means so, therefore, or as a result.

It connects the two parts of the sentence:

• the laptop froze
• as a result, I couldn’t send the report

In standard Polish, a comma is normally used before więc when it joins clauses like this.

So:

• Mój laptop znowu się zawiesił, więc nie mogłem wysłać raportu.

Nie mogłem means I couldn’t if the speaker is male.

The verb móc means can / be able to, and in the past tense Polish shows the speaker’s gender in the first person singular:

• mogłem = I could / I was able to (male speaker)
• mogłam = I could / I was able to (female speaker)

So a woman would say:

• Mój laptop znowu się zawiesił, więc nie mogłam wysłać raportu.

Because Polish often drops subject pronouns when they are already clear from the verb form.

Mogłem already means I could for a male speaker, so ja is unnecessary.

You would add ja only for emphasis or contrast, for example:

• Ja nie mogłem wysłać raportu, ale ona mogła. = I couldn’t send the report, but she could.

Because wysłać is the perfective form, and it fits the meaning here: one complete act of sending the report.

• wysłać = to send once / to send successfully
• wysyłać = to be sending / to send repeatedly / habitually

In this sentence, the idea is that there was one specific report, and the speaker was unable to complete the act of sending it:

• nie mogłem wysłać raportu = I couldn’t send the report

If you used wysyłać, it would suggest a repeated or ongoing action, which does not fit as well here.

Because after negation, Polish often uses the genitive instead of the accusative for a direct object.

Without negation:

• mogłem wysłać raport = I could send the report

With negation:

• nie mogłem wysłać raportu = I couldn’t send the report

Here:

• raport = nominative/accusative singular
• raportu = genitive singular

This is a very important pattern in Polish, especially in more standard or careful language. A learner will often see genitive after nie with verbs like this.

Yes. Polish word order is fairly flexible, because endings carry a lot of the grammatical information.

The sentence given is natural and neutral:

• Mój laptop znowu się zawiesił, więc nie mogłem wysłać raportu.

But you could also say:

• Znowu mój laptop się zawiesił...
• Mój laptop się znowu zawiesił...

These versions shift emphasis slightly:

• starting with znowu emphasizes again
• moving words around can make the sentence sound more emotional, contrastive, or conversational

One thing to remember is that się usually stays near the verb and normally does not go in first position.

No, but it is very common for computers, phones, programs, and websites.

It can also be used colloquially for people, meaning something like:

• to blank out
• to freeze for a moment
• to stop reacting

For example:

• Na chwilę się zawiesiłem. = I blanked out for a moment.

So the basic idea is something stops functioning smoothly for a moment, whether it is a machine or, informally, a person.