Breakdown of Con que la luz sea indirecta, las plantas prosperan.
ser
to be
que
that / than
la planta
the plant
la luz
light
con que
as long as (con que + subjunctive)
prosperar
to thrive
indirecto
indirect
Questions & Answers about Con que la luz sea indirecta, las plantas prosperan.
Why do we use the subjunctive sea here instead of the indicative es?
The phrase con que translates to "as long as" or "provided that" in this context. It introduces a minimal condition that needs to be met for the plants to thrive. Because it sets up a hypothetical requirement rather than stating a declared fact, it always triggers the subjunctive.
How is con que different from just saying si (if) or siempre y cuando?
While si just sets up a neutral condition, con que emphasizes minimal sufficiency. It implies "it is enough if..." or "all you need is...". Siempre y cuando is very similar and also means "as long as" (and also takes the subjunctive), but con que is often preferred in conversation to stress that this is the only requirement.
If the first clause uses the subjunctive, why is prosperan in the regular present tense?
The subjunctive sea is only required inside the conditional clause introduced by con que. The main clause (las plantas prosperan) states the factual result of that condition. Since we are describing a general truth about what plants do when the condition is met, the present indicative is the correct choice here.
Why do we use a form of ser (sea) instead of estar (esté) to talk about the light?
We use ser because being indirecta is a defining characteristic or permanent classification of the light in this scenario. You are specifying the exact kind of light the plants need, rather than a temporary physical state or location, so ser is required.
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