Nós formamos uma boa equipe.

Yes. In Portuguese, subject pronouns are often omitted because the verb ending already shows who the subject is.

• formamos already tells you it is we
• So Formamos uma boa equipe is completely natural

Using nós can add:

• emphasis: We make a good team
• contrast: We make a good team, but they do not
• clarity in some contexts

In Brazilian Portuguese, both versions are common.

Here it is most likely present tense: we form / we make.

But there is an important detail: in Brazilian Portuguese, formamos can also be simple past for this verb:

• present: nós formamos
• simple past: nós formamos

The form is the same in writing, so context tells you which meaning is intended.

For example:

• Hoje formamos uma boa equipe → present
• Ontem formamos uma boa equipe → past

In your sentence, without a past-time clue, learners usually understand it as present.

Both are possible, but they are not exactly the same.

• Nós formamos uma boa equipe = we make up a good team together; we function well as a team
• Nós somos uma boa equipe = we are a good team

So formamos emphasizes the idea that the people together constitute or make a good team. It is very close to English We make a good team.

Because equipe is a feminine noun.

In Portuguese, adjectives must agree with the noun:

• uma equipe boa
• uma boa equipe

Since equipe is feminine singular, the adjective must also be feminine singular:

• boa

This is also why the article is uma, not um.

Yes. Equipe is a feminine noun, and you simply have to learn its gender with the word:

• a equipe
• uma equipe
• boa equipe

The ending -e does not reliably tell you gender in Portuguese. Some -e nouns are masculine, some are feminine.

Yes, you can say uma equipe boa, but uma boa equipe is more natural here.

In Portuguese, adjective position can affect style or nuance:

• uma boa equipe → the most natural, common way to say it
• uma equipe boa → understandable, but it may sound a little less natural or slightly more marked

With very common adjectives like bom/boa, placing the adjective before the noun is often the default in sentences like this.

Normally, no. Nós formamos boa equipe sounds unnatural in standard everyday Portuguese.

Portuguese usually wants an article with a singular countable noun here:

• uma boa equipe

So this structure is the natural one:

• nós formamos uma boa equipe

English sometimes drops articles in ways Portuguese does not.

Sometimes, yes, but the nuance changes a little.

• equipe is a very common and neutral word for a team, especially in work, school, projects, or professional settings
• time is also common in Brazil, especially in sports, and also in informal business language

So:

• Nós formamos uma boa equipe sounds very natural and neutral
• Nós formamos um bom time is also possible, but may sound a bit more informal or sports-like depending on context

Yes. In Brazilian Portuguese, a gente is very common in speech and often means we.

So you can say:

• A gente forma uma boa equipe

But notice the verb:

• nós formamos
• a gente forma

Even though a gente means we, it uses third-person singular verb forms.

Nuance:

• nós formamos → a bit more formal or careful
• a gente forma → very common in everyday spoken Brazilian Portuguese

A simple approximate pronunciation is:

nohs for-MAH-mus OO-ma BOH-ah eh-KEE-pee

A few helpful notes:

• nós has the stress on the only syllable
• formamos has the stress on ma
• equipe has the stress on qui

A broad IPA version is:

/nɔs foʁˈmɐmus ˈumɐ ˈbo.ɐ eˈkipi/

Pronunciation varies by region in Brazil, but this is a good general guide for learners.