Learn Dutch: We zagen hem gisteren op het dorpsplein. - We saw him yesterday on the village square.

This is a linking 's' (tussen-s). It connects the two nouns dorp (village) and plein (square) to form a compound noun. Unlike the linking '-e(n)-', there are no strict logical rules for when to use the linking '-s-'; it often appears simply because it makes the pronunciation smoother. You generally have to memorize which compounds use it as you encounter them.

How do I know whether to use 'de' or 'het' for a compound noun like dorpsplein?

In Dutch compound nouns, the article is always decided by the very last word in the chain. Because it is het plein (the square), the entire compound becomes a het word. (By coincidence, dorp is also a het word, but only plein dictates the grammar here).

Why is gisteren placed before the location, instead of at the end of the sentence?

Dutch follows a strict "Time, Manner, Place" rule for word order. Time adverbs like gisteren (yesterday) usually come as early as possible, right after the verb and specific pronouns (like hem). The place, op het dorpsplein, must come later. Putting gisteren at the very end would sound quite unnatural to a native speaker.

Why do we use the preposition op here instead of in?