Questions & Answers about Puistossa on vanha ihminen.
Why doesn't the sentence start with a word for "there"?
What does the -ssa ending on puistossa mean?
The -ssa ending means "in" or "inside" (this is called the inessive case). It attaches directly to the basic word puisto (park) to make puistossa (in the park). Starting the sentence with this location is the classic way to build a "there is" sentence in Finnish.
Why are vanha and ihminen in their basic forms?
In an existential clause, the thing or person existing in the location is the subject, and it stays in the basic dictionary form (the nominative case) when it's a single countable thing. Since vanha (old) is an adjective describing ihminen (person), they both stay in that basic form together.
If there were multiple old people, would the verb change to ovat (are)?