Drużyna gra przeciw nam.

Because drużyna is a singular noun: team.

In Polish, the verb must agree with the grammatical number of the subject:

• drużyna gra = the team plays / is playing
• drużyny grają = the teams play / are playing

Even though a team contains many people, Polish treats drużyna as one singular unit, so the verb is singular too.

Because przeciw requires the dative case, and the dative form of my (we / us) is nam.

So:

• my = we
• nas = us, but in other cases such as genitive or accusative
• nam = to us / against us after przeciw

That is why you say:

• przeciw nam = against us

not:

• przeciw nas ✘

It is the dative case.

A useful pattern to remember is:

• przeciw + dative

Examples:

• przeciw nam = against us
• przeciw mnie = against me
• przeciw tobie = against you
• przeciw drużynie = against the team

So in this sentence, nam is the dative form required by przeciw.

Yes. Przeciw and przeciwko can both mean against.

So both are correct:

• Drużyna gra przeciw nam.
• Drużyna gra przeciwko nam.

In many contexts, przeciwko sounds a bit fuller or more formal, while przeciw is very common and natural, especially in shorter expressions.

Yes. Drużyna is feminine.

You can tell partly from the ending -a, which is often feminine in Polish. That matters for agreement in other parts of the sentence, for example:

• ta drużyna = this team
• dobra drużyna = a good team

In the present tense, gra works for all singular third-person subjects, so the gender is not visible in the verb here. But the noun itself is feminine.

Because Polish does not use articles like a or the.

So drużyna can mean:

• a team
• the team

The exact meaning depends on context. In English you must choose, but in Polish you usually do not mark that distinction.

It can mean both, depending on context.

Polish present tense often covers both:

• a general meaning: plays
• an action happening now: is playing

So Drużyna gra przeciw nam could mean:

• The team plays against us
• The team is playing against us

The surrounding context tells you which meaning is intended.

Not completely. Polish word order is more flexible than English word order.

The neutral, straightforward order here is:

• Drużyna gra przeciw nam.

But other orders are possible for emphasis, for example:

• Przeciw nam gra drużyna.
• Gra przeciw nam drużyna.

These sound more marked and depend on context. For a learner, the original order is the safest and most natural default.

A rough guide:

• drużyna ≈ droo-ZHI-na
• przeciw ≈ PSHE-chif or PSHE-chiv depending on speech

A few useful pronunciation points:

• ż sounds like the s in measure
• rz usually sounds like ż
• cz sounds like ch in chop
• y is not the English ee; it is a harder vowel

And nam is simply pronounced like nahm.

No, not if you mean against us.

• przeciw nam = against us
• z nami = with us

So the meanings are opposite:

• Drużyna gra przeciw nam. = The team is playing against us.
• Drużyna gra z nami. = The team is playing with us / alongside us, or simply playing a game with us depending on context.

This is an important distinction to remember.

The dictionary form is grać, meaning to play.

Here is the relevant present-tense pattern:

• ja gram = I play
• ty grasz = you play
• on/ona/ono gra = he/she/it plays
• my gramy = we play
• wy gracie = you play
• oni/one grają = they play

So gra is the third person singular form of grać.