Ellei aurinko paista, pysyn sisällä.

Unless the sun is shining, I stay inside.

Breakdown of Ellei aurinko paista, pysyn sisällä.

• minä: I
• sisällä: inside
• pysyä: to stay
• paistaa: to shine
• ellei: unless
• aurinko: sun

Questions & Answers about Ellei aurinko paista, pysyn sisällä.

What does ellei mean, and how is it different from jos ... ei?

Ellei is a conjunction meaning unless / if ... not. It already contains the negative idea, so the verb that follows is usually affirmative:

• Ellei aurinko paista = Unless the sun shines / If the sun doesn’t shine

You can also say:

• Jos aurinko ei paista, pysyn sisällä. = If the sun doesn’t shine, I’ll stay inside.

Difference in feel:

• ellei often sounds a bit more compact and “unless”-like (it sets an exception).
• jos ... ei is a straightforward “if ... not”.

Why isn’t it Ellei aurinko ei paista (with ei)?

Because ellei already provides the negation. So you normally don’t add ei again.

Correct:

• Ellei aurinko paista...

With ei, you would switch to jos:

• Jos aurinko ei paista...

What verb form is paista here? Is it an infinitive?

It’s not an infinitive. paista here is the present tense, 3rd person singular form of the verb paistaa (to shine):

• (aurinko) paistaa → aurinko paista-a (dictionary form)
• Present 3rd singular: paistaa (looks the same as the dictionary form)

So aurinko paista(a) = the sun shines.

Why is the verb in the “unless” clause in the present tense, not some special conditional form?

Finnish commonly uses the present indicative in conditional/temporal clauses when English might talk about the future:

• Ellei aurinko paista, pysyn sisällä.
  Even though it can refer to the future (“If it doesn’t shine (later), I’ll stay inside”), Finnish still uses present forms.

If you wanted to add a more hypothetical “would” feeling, you could use the conditional:

• Ellei aurinko paistaisi, pysyisin sisällä. = If the sun didn’t shine, I would stay inside.

What does pysyn mean exactly, and why not olen?

pysyn is 1st person singular present of pysyä = to stay / remain.

• pysyn sisällä focuses on staying (remaining) indoors.
• olen sisällä focuses more on being indoors (a state), not necessarily the decision to remain there.

In many everyday contexts, both can be possible, but pysyn fits well when the idea is “I’ll stay in (instead of going out).”

Why is there no minä (“I”) in the sentence?

Finnish often omits personal pronouns because the verb ending shows the person:

• pysyn already means I stay / I’ll stay.

You can add minä for emphasis or contrast:

• Ellei aurinko paista, minä pysyn sisällä. = “... I will stay inside (even if others don’t).”

What case is sisällä, and why is it that form?

sisällä is the adessive form (ending -llä/-llä) of sisä- (inside), used as a location adverb meaning inside / indoors.

Common related forms:

• sisällä = (being) inside
• sisälle = to inside (movement into)
• sisältä = from inside (movement out from inside)

So pysyn sisällä = “I stay indoors/inside (at that location).”

Why is there a comma in Ellei aurinko paista, pysyn sisällä.?

In Finnish, you normally put a comma between a subordinate clause and the main clause when the subordinate clause comes first:

• Ellei aurinko paista, (subordinate clause)
• pysyn sisällä. (main clause)

If you reverse the order, you still typically use a comma:

• Pysyn sisällä, ellei aurinko paista.

Can the word order be changed? For example, can I put pysyn sisällä first?

Yes. Both are natural:

• Ellei aurinko paista, pysyn sisällä.
• Pysyn sisällä, ellei aurinko paista.

The difference is mainly information structure:

• Starting with Ellei... sets the condition first.
• Starting with Pysyn... states your action first, then adds the condition.

Does this sentence sound like a general habit or a specific decision?

It can be either, depending on context. The present tense can express:

• a general rule/habit: “When it’s not sunny, I stay in.”
• a decision about a situation (including near future): “If it’s not sunny (today), I’ll stay in.”

If you want to make the “habit” reading more explicit, you might add a time word like silloin (“then”) or yleensä (“usually”):

• Ellei aurinko paista, pysyn yleensä sisällä. = “If the sun isn’t shining, I usually stay indoors.”