Competimos siempre que el presentador indique el tiempo límite.

Because siempre que often triggers the subjunctive when it refers to something expected, hypothetical, or still in the future.

In this sentence, the idea is roughly:

• we compete whenever / provided that the presenter gives the time limit

That is not being presented as a repeated fact already known to happen every time, but as a condition or future possibility. That is why Spanish uses indique (present subjunctive), not indica.

A very common pattern is:

• siempre que + subjunctive = provided that / whenever, as long as
• siempre que + indicative = whenever / every time that as a real repeated fact

So here, indique fits the conditional/future sense.

Here, siempre que can mean either:

• whenever
• provided that
• as long as

The exact English choice depends on context.

In this sentence, many learners first read it as whenever, but because of the subjunctive indique, it can also strongly suggest provided that / as long as.

So the sentence could be understood as something like:

• We compete whenever the presenter states the time limit.
• We compete provided that the presenter states the time limit.

Both are grammatically possible; context would decide which feels more natural.

Yes. That is an important contrast.

Compare:

• Siempre que el presentador indica el tiempo límite, competimos.
  = Every time the presenter states the time limit, we compete.
  This sounds like a habitual fact.

• Competimos siempre que el presentador indique el tiempo límite.
  = We compete whenever / provided that the presenter states the time limit.
  This sounds conditional, expected, or future-oriented.

So the mood changes the meaning:

• indicative = real, habitual, factual
• subjunctive = conditional, projected, not yet confirmed

Spanish often uses the present tense for:

• habitual actions
• general rules
• scheduled or repeated situations

So competimos does not have to mean only we are competing right now. It can mean:

• we compete
• we take part
• we compete whenever...
• our rule is that we compete when...

In this sentence, it sounds like a general rule or recurring situation.

Because Spanish usually leaves out subject pronouns when the verb already shows who the subject is.

• competimos clearly means we compete

So nosotros is unnecessary unless you want emphasis or contrast.

For example:

• Competimos siempre que... = normal
• Nosotros competimos siempre que... = we compete..., possibly contrasting with someone else

Spanish is a pro-drop language, so omitted subject pronouns are very common.

Presentador usually means presenter, host, or announcer, depending on context.

In Spain, presentador is very common for someone who presents:

• a TV programme
• a radio show
• an event
• a contest or game

So in this sentence, it likely means the person in charge of announcing or introducing the time limit.

A native English speaker might sometimes think of host first, but presenter is often the closest direct match.

Yes, el límite de tiempo is also possible and may even sound more natural to some speakers in many contexts.

Both can work:

• el tiempo límite
• el límite de tiempo

But they are not always used in exactly the same way in every situation.

Generally:

• límite de tiempo is a very common way to say time limit
• tiempo límite can also be used, especially in formal or specific contexts

So the sentence is grammatical, but a learner should know that límite de tiempo is also very common Spanish.

Límite is a masculine noun:

• el límite

This can be confusing because many nouns ending in -e do not clearly signal gender.

So you simply need to learn it as:

• el límite
• los límites

In the sentence, that is why you get:

• el tiempo límite

A few useful pronunciation notes:

• competimos → stress on -ti-: com-pe-TI-mos
• presentador → stress on the final -dor: pre-sen-ta-DOR
• límite → stress on LÍ because of the written accent: LÍ-mi-te

The accent mark in límite is important because without it, the stress would fall differently.

Also:

• que el is often pronounced smoothly together in normal speech
• indique has a hard g sound before u + e, roughly in-DI-ke

It is a main clause plus a subordinate clause introduced by siempre que.

Structure:

• Competimos = main clause
• siempre que el presentador indique el tiempo límite = subordinate clause of time/condition

So the pattern is:

• main action + siempre que + condition/event

This is a very common Spanish structure for expressing:

• rules
• conditions
• repeated situations
• future-dependent actions

Not much. You could also say:

• Siempre que el presentador indique el tiempo límite, competimos.

This keeps the same basic meaning.

The main difference is emphasis:

• Competimos siempre que... puts the focus first on we compete
• Siempre que..., competimos puts the condition first

Both are natural Spanish. The choice depends on what the speaker wants to highlight.