Se o novo governo cumprir metade das promessas, já fico satisfeito.

In Se o novo governo cumprir metade das promessas, cumprir is in the future subjunctive.

• For regular -ir verbs, the infinitive and the future subjunctive look the same: cumprir.
• You can tell it’s future subjunctive because:
  • It comes after se (if), and
  • It refers to a future / hypothetical situation, not a habitual present one.

In European Portuguese, when you talk about a real future condition with se, you normally use:

• Future subjunctive in the if-clause
• Present or future in the main clause

So:

• Se o novo governo cumprir metade das promessas, já fico satisfeito.
  ➜ If the new government keeps (in the future) half the promises, I’ll be satisfied.

Compare with a present-time, habitual condition, which would take the present indicative:

• Se o novo governo cumpre metade das promessas, fico satisfeito.
  (Sounds more like: Whenever the new government keeps half the promises, I’m satisfied. – odd in this context.)

For a more hypothetical or unlikely situation (like English “If … kept / would be”), you use:

• Imperfect subjunctive in the if-clause
• Conditional in the main clause

So you'd say:

• Se o novo governo cumprisse metade das promessas, já ficaria satisfeito.
  
  • cumprisse = imperfect subjunctive of cumprir
  • ficaria = conditional of ficar

Nuance:

• cumprir / fico ➜ real, plausible future: If they actually do it, I’ll be satisfied
• cumprisse / ficaria ➜ more hypothetical, doubtful: If they were to do it (which I don’t really expect), I would be satisfied

Literally, já means “already”, but in this sentence it has a slightly different, idiomatic nuance.

In já fico satisfeito, já conveys ideas like:

• “even”: Even that would be enough for me
• “as far as I’m concerned, that’s already enough”*
• A sense of lowered expectations or minimum requirement

So the nuance is:

• Se o novo governo cumprir metade das promessas, já fico satisfeito.
  ➜ If the new government keeps even half the promises, that’s already enough for me.

You could remove já:

• … fico satisfeito.
  Still correct, but weaker, more neutral. Já adds: I’m not asking for much; even that would do.

Both ficar and estar can relate to states, but:

• ficar often means “to become / to end up / to be (as a result of something)”
• estar is more like “to be (in a state, right now)”

In a conditional like this, ficar is very natural because we’re talking about the resulting reaction or state if the condition happens:

• Se o novo governo cumprir metade das promessas, já fico satisfeito.
  ➜ I (will) end up satisfied / I’ll be satisfied as a result.

If you said:

• … já estou satisfeito.
  This sounds more like I am already satisfied (now), which doesn’t match the future condition.

You could say:

• Se o novo governo cumprir metade das promessas, vou ficar satisfeito.
  (more explicitly future: I’m going to be satisfied.)

But the plain present fico with a future meaning is very common and natural here.

Satisfeito / satisfeita is an adjective and must agree with the subject in gender and number.

• The subject of fico is eu (I), which is omitted because it’s clear from the verb ending.
• If the speaker is a man, he says:
  
  • (Eu) fico satisfeito.
• If the speaker is a woman, she says:
  
  • (Eu) fico satisfeita.

So:

• A male speaker: Se o novo governo cumprir metade das promessas, já fico satisfeito.
• A female speaker: Se o novo governo cumprir metade das promessas, já fico satisfeita.

The sentence you gave assumes a male speaker.

Metade (half) usually appears as:

• metade de + [something]

When [something] has a definite article (like as promessas – the promises), de + as contracts to:

• das

So:

• metade de as promessas → metade das promessas

Structure:

• metade das promessas = half of the promises
• metade da comida = half of the food
• metade do dinheiro = half of the money

You can also say:

• metade das promessas do governo = half of the government’s promises
• metade das minhas promessas = half of my promises

Note that metade itself is singular (it’s one half), but what follows (das promessas) can be plural.

In Portuguese, you almost always need a definite article with nouns like governo when you mean “the government” in a specific sense.

• o governo = the (specific) government
• um governo = a (not specific) government

So:

• Se o novo governo cumprir metade das promessas…
  = If the new government keeps… (the specific, upcoming one everyone knows about)

Without the article:

• Se novo governo cumprir…
  Sounds wrong / ungrammatical in standard Portuguese.

Portuguese generally uses definite articles more often than English, including with institutions and abstract nouns.

The comma marks the separation between:

• The conditional clause: Se o novo governo cumprir metade das promessas
• The main clause: já fico satisfeito.

In Portuguese writing:

• If the if-clause (oração condicional) comes first, you usually write a comma before the main clause.
• If the if-clause comes after the main clause, you usually don’t use a comma.

So both are correct:

• Se o novo governo cumprir metade das promessas, já fico satisfeito.
• Já fico satisfeito se o novo governo cumprir metade das promessas. (no comma)

In European Portuguese, it’s very common to use the present indicative to talk about a future result when the future is clear from context, especially after a future condition:

• Se o novo governo cumprir metade das promessas, já fico satisfeito.
  ➜ understood as future: … I’ll be satisfied.

You could also say:

• … já ficarei satisfeito.
  (more formally explicit future: I will be satisfied.)

Nuance:

• fico is a bit more colloquial / natural in everyday speech.
• ficarei sounds a bit more formal or emphatic, but it’s not wrong.

In this sentence, the canonical and most natural position is:

• … já fico satisfeito.

You could say:

• … fico já satisfeito.

This is still correct, but it sounds more marked or slightly old-fashioned / emphatic in many contexts.

The meaning doesn’t change much; já still expresses:

• “already / even / that’s enough for me”

However:

• já fico satisfeito is what you should normally use.
• Other positions (like fico satisfeito já) are either unnatural here or change focus in subtle ways that natives avoid in this exact structure.

So, for learning purposes, keep:

• Se o novo governo cumprir metade das promessas, já fico satisfeito.