Learn Swedish: Konspirationsteorin ska vara väldigt sann. - The conspiracy theory is said to be very true.

In Swedish, ska isn't just for future plans or commands. It is frequently used to report hearsay, rumors, or unverified claims. When used this way, ska plus an infinitive like vara means "is said to" or "is supposed to." It shows you are repeating what you've heard or read without guaranteeing it is a fact.

Could I use lär vara instead of ska vara in this sentence?

Yes, you can! Both can translate to "is said to be." The difference is subtle: ska usually implies that you are reporting something someone specifically said or a circulating rumor (hearsay), while lär leans a bit more toward "is probably" based on general consensus or assumption. In casual speech, they are often interchangeable here.

How would I change this sentence to say the theory "is said to have been very true"?

To express hearsay about the past, you use ska ha followed by the supinum form of the main verb. To say "is said to have been," you would use ska ha varit. The full sentence would become: Konspirationsteorin ska ha varit väldigt sann.

Why do we use sann here instead of sant?