Breakdown of Čovjek s mamcem ide na obalu.
čovjek
man
na
on, at / to, onto (with motion) / about (thinking about)
ići
to go
s
with
Questions & Answers about Čovjek s mamcem ide na obalu.
Why does the dictionary word mamac become mamcem here?
Two things happen here. First, the second 'a' in mamac is a fleeting 'a' (nepostojano a), which drops out when you add grammatical endings, leaving the stem mamc-. Second, because the stem ends in the soft consonant c, the instrumental case ending is -em rather than the usual -om.
Why do we use s instead of sa for 'with' in this sentence?
The longer form sa is generally only required when the next word starts with a sibilant consonant (s, z, š, or ž) or certain tricky consonant clusters. Since mamcem starts with m, the basic form s is the standard choice.
The word obala is in the accusative case (obalu). Since na can also take the locative case, why isn't it na obali?
We use na with the accusative case because the verb ide (goes) indicates motion toward a destination. If the man were already doing something while physically located on the coast, you would use the locative case (na obali) to express location rather than direction.
Could we change the word order to: Čovjek ide na obalu s mamcem?